Include a missing header,which was implicitly included and removed.

This commit was SVN r20563.

orte/mca/plm/process/plm_process_component.c

@@ -5,7 +5,7 @@
  * Copyright (c) 2004-2006 The University of Tennessee and The University
  *                         of Tennessee Research Foundation.  All rights
  *                         reserved.
- * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
+ * Copyright (c) 2004-2009 High Performance Computing Center Stuttgart, 
  *                         University of Stuttgart.  All rights reserved.
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
@@ -41,10 +41,10 @@
 
 #include "orte/mca/errmgr/errmgr.h"
 #include "orte/mca/rml/rml.h"
-
 #include "orte/mca/plm/plm.h"
 #include "orte/mca/plm/base/plm_private.h"
 #include "orte/mca/plm/process/plm_process.h"
+#include "orte/util/show_help.h" 
 
 /*
  * Local function