don't use macro or it will try to use the (now destroyed) MPI_COMM_WORLD,

which isn't going to work well

Refs trac:419

This commit was SVN r11822.

The following Trac tickets were found above:
  Ticket 419 --> https://svn.open-mpi.org/trac/ompi/ticket/419

ompi/mpi/c/init_thread.c

@@ -53,7 +53,8 @@ int MPI_Init_thread(int *argc, char ***argv, int required,
 
     if (ompi_mpi_finalized) {
         /* JMS show_help */
-        return OMPI_ERRHANDLER_INVOKE(null, MPI_ERR_OTHER, FUNC_NAME);
+        return ompi_errhandler_invoke(NULL, NULL, OMPI_ERRHANDLER_TYPE_COMM, 
+                                      MPI_ERR_OTHER, FUNC_NAME);
     } else if (ompi_mpi_initialized) {
         /* JMS show_help */
         return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_OTHER, FUNC_NAME);