Remove unused variable (and associated compiler warning).


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13625 a5019735-40e9-0310-863c-91ae7b9d1cf9
Filter out the dynamic linker from back traces.
Patch by Maran Pakkirisamy (maranp@linux.vnet.ibm.com).


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13626 a5019735-40e9-0310-863c-91ae7b9d1cf9