Put back the commit r20562 as it had a reason to be there: clean

a memory leak.

This commit was SVN r20566.

The following SVN revision numbers were found above:
  r20562 --> open-mpi/ompi@62c913f851

opal/event/event.c

@@ -1,5 +1,8 @@
 /*
  * Copyright (c) 2008      Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2008-2009 The University of Tennessee and The University
+ *                         of Tennessee Research Foundation.  All rights
+ *                         reserved.
  * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
  * All rights reserved.
  *
@@ -386,6 +389,10 @@ int opal_event_fini(void)
     if (NULL != opal_event_module_include) {
         opal_argv_free(opal_event_module_include);
     }
+    if( NULL != opal_current_base ) {
+        event_base_free(opal_current_base);
+        opal_current_base = NULL;
+    }
 
     return OPAL_SUCCESS;
 }