The length of the ranks-arrays can be longer than the size of the according

groups. And zero is also an acceptable value according to the MPI spec.

Fixes trac:428

This commit was SVN r11841.

The following Trac tickets were found above:
  Ticket 428 --> https://svn.open-mpi.org/trac/ompi/ticket/428

ompi/mpi/c/group_translate_ranks.c

@@ -46,7 +46,7 @@ int MPI_Group_translate_ranks(MPI_Group group1, int n_ranks, int *ranks1,
             return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_GROUP, 
                                           FUNC_NAME);
         }
-        if( (n_ranks > group1->grp_proc_count) || (0 >= n_ranks) ){
+        if( 0 > n_ranks ){
             return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_GROUP, 
                                           FUNC_NAME);
         }