fix a next line problem for m4

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1904 c368ceb8-fd28-0410-a457-e46ee1d7cd4a
fix assing argument 1 of 'MPI_Bcast' discards qualifiers from pointer target type

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1905 c368ceb8-fd28-0410-a457-e46ee1d7cd4a
avoid the Allreduce in file close. Allreduce is required only for independent mode, as in collective mode, numrecs is always sync-ed

git-svn-id: https://svn.mcs.anl.gov/repos/parallel-netcdf/trunk@1906 c368ceb8-fd28-0410-a457-e46ee1d7cd4a