Don't let the compiler copy a struct into another location. Do it by hand only

on the required fields.

This commit was SVN r11696.

ompi/request/req_wait.c

@@ -53,9 +53,10 @@ finished:
     /* return status */
     if( MPI_STATUS_IGNORE != status ) {
         /* See MPI-1.2, sec 3.2.5, p.22 */
-        int old_error = status->MPI_ERROR;
-        *status = req->req_status;
-        status->MPI_ERROR = old_error;
+        status->MPI_TAG    = req->req_status.MPI_TAG;
+        status->MPI_SOURCE = req->req_status.MPI_SOURCE;
+        status->_count     = req->req_status._count;
+        status->_cancelled = req->req_status._cancelled;
     }
     if( req->req_state == OMPI_REQUEST_INACTIVE ) {
         return OMPI_SUCCESS;