- Fix Coverity CID 30;

If there is no errhandler, can't reference it...
   Return early.

This commit was SVN r21187.

ompi/errhandler/errhandler_invoke.c

@@ -38,6 +38,7 @@ int ompi_errhandler_invoke(ompi_errhandler_t *errhandler, void *mpi_object,
     /* If we got no errorhandler, then just invoke errors_abort */
     if (NULL == errhandler) {
         ompi_mpi_errors_are_fatal_comm_handler(NULL, NULL, message);
+	return err_code;
     }
     
     /* Figure out what kind of errhandler it is, figure out if it's