Properly initialize this variable

This commit was SVN r21130.

opal/tools/opal-checkpoint/opal-checkpoint.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
+ * Copyright (c) 2004-2009 The Trustees of Indiana University and Indiana
  *                         University Research and Technology
  *                         Corporation.  All rights reserved.
  * Copyright (c) 2004-2005 The University of Tennessee and The University
@@ -148,7 +148,7 @@ int
 main(int argc, char *argv[])
 {
     int ret, exit_status = OPAL_SUCCESS;
-    char *fname;
+    char *fname = NULL;
     opal_crs_state_type_t cr_state;
 
     /***************