- Fix ‘ret’ may be used uninitialized in this function

As orte_util_nidmap_finalize does not return an error, initialize
    ret=ORTE_SUCCESS

This commit was SVN r21115.

orte/mca/ess/slurmd/ess_slurmd_module.c

@@ -348,7 +348,7 @@ error:
 
 static int rte_finalize(void)
 {
-    int ret;
+    int ret = ORTE_SUCCESS;
    
     if (app_init_complete) {
         /* use the default procedure to finish */