Fixing un-initialized value

Could someone else try to run with this patch through valgrind, I am currently getting a huge number of failing tests with the following (I am using rod with gcc on current libMesh):

```
kernels/adv_diff_reaction_transient.test: ==31725== LEAK SUMMARY:
kernels/adv_diff_reaction_transient.test: ==31725==    definitely lost: 42,763 bytes in 40 blocks
kernels/adv_diff_reaction_transient.test: ==31725==    indirectly lost: 11,278 bytes in 38 blocks
kernels/adv_diff_reaction_transient.test: ==31725==      possibly lost: 0 bytes in 0 blocks
kernels/adv_diff_reaction_transient.test: ==31725==    still reachable: 313,759 bytes in 1,583 blocks
kernels/adv_diff_reaction_transient.test: ==31725==         suppressed: 60 bytes in 1 blocks
kernels/adv_diff_reaction_transient.test: ==31725== Reachable blocks (those to which a pointer was found) are not shown.
kernels/adv_diff_reaction_transient.test: ==31725== To see them, rerun with: --leak-check=full --show-reachable=yes
kernels/adv_diff_reaction_transient.test: ==31725== 
kernels/adv_diff_reaction_transient.test: ==31725== ERROR SUMMARY: 39 errors from 39 contexts (suppressed: 32 from 4)
kernels/adv_diff_reaction_transient.test: ==31725== 
kernels/adv_diff_reaction_transient.test: ==31725== 1 errors in context 1 of 39:
kernels/adv_diff_reaction_transient.test: ==31725== Syscall param writev(vector[...]) points to uninitialised byte(s)
kernels/adv_diff_reaction_transient.test: ==31725==    at 0x8206D4B: writev (writev.c:51)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x109C6932: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x109C76BC: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x109CAB16: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x103B5834: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x103B5D7F: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x10DD6167: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7AD7EB9: ompi_mpi_init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7AEE9AA: PMPI_Init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x676B9EB: libMesh::LibMeshInit::LibMeshInit(int, char const* const*, ompi_communicator_t*) (libmesh.C:372)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x59303F4: MooseInit::MooseInit(int, char**, ompi_communicator_t*) (MooseInit.C:32)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x40C055: main (main.C:12)
kernels/adv_diff_reaction_transient.test: ==31725==  Address 0x138c5751 is 161 bytes inside a block of size 256 alloc'd
kernels/adv_diff_reaction_transient.test: ==31725==    at 0x4C2B7B2: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B632F6: opal_dss_buffer_extend (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B63605: opal_dss_copy_payload (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B3AFC6: orte_grpcomm_base_pack_modex_entries (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x10DD6032: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7AD7EB9: ompi_mpi_init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7AEE9AA: PMPI_Init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x676B9EB: libMesh::LibMeshInit::LibMeshInit(int, char const* const*, ompi_communicator_t*) (libmesh.C:372)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x59303F4: MooseInit::MooseInit(int, char**, ompi_communicator_t*) (MooseInit.C:32)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x40C055: main (main.C:12)
kernels/adv_diff_reaction_transient.test: ==31725==  Uninitialised value was created by a heap allocation
kernels/adv_diff_reaction_transient.test: ==31725==    at 0x4C2B6CD: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B6B293: opal_ifinit.part.0 (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B6B974: opal_ifcount (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x109C51AA: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B45ED2: mca_oob_base_init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x103B3C2F: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B511C3: orte_rml_base_select (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B36C04: orte_ess_base_app_setup (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x107BCB13: ???
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7B17669: orte_init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7AD7BD0: ompi_mpi_init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725==    by 0x7AEE9AA: PMPI_Init (in /opt/moose/openmpi/openmpi-1.6.5/gcc-opt/lib/libmpi.so.1.0.8)
kernels/adv_diff_reaction_transient.test: ==31725== 
kernels/adv_diff_reaction_transient.test: --31725-- 
kernels/adv_diff_reaction_transient.test: --31725-- used_suppression:      1 getpwuid
kernels/adv_diff_reaction_transient.test: --31725-- used_suppression:     29 OpenMPI1
kernels/adv_diff_reaction_transient.test: --31725-- used_suppression:      2 dl-hack3-cond-1
kernels/adv_diff_reaction_transient.test: ==31725== 
kernels/adv_diff_reaction_transient.test: ==31725== ERROR SUMMARY: 39 errors from 39 contexts (suppressed: 32 from 4)
```