- Help the compiler, by noting that errors are unlikely.

This commit was SVN r19138.

ompi/errhandler/errhandler.h

@@ -239,7 +239,7 @@ struct ompi_request_t;
  */
 #define OMPI_ERRHANDLER_RETURN(rc, mpi_object, err_code, message) \
   OPAL_CR_EXIT_LIBRARY() \
-  if (rc != OMPI_SUCCESS) { \
+  if ( OPAL_UNLIKELY(OMPI_SUCCESS != rc) ) { \
     int __mpi_err_code = (err_code < 0 ? (ompi_errcode_get_mpi_code(err_code)) : err_code); \
     ompi_errhandler_invoke((mpi_object)->error_handler, \
                            (mpi_object), \