Oops -- put back Tim's workaround.

This commit was SVN r3787.

src/runtime/ompi_progress.c

@@ -26,7 +26,7 @@ int ompi_progress_pending_io_reqs = false;
 
 void ompi_progress_events(int flag)
 {
-#if 1
+#if 0
     if(flag != 0 || ompi_progress_event_flag == OMPI_EVLOOP_ONCE) {
         ompi_progress_event_flag = flag;
     }