sec/munge: plug a memory leak

Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>

opal/mca/sec/munge/sec_munge.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2015      Intel, Inc. All rights reserved.
- * Copyright (c) 2015      Research Organization for Information Science
+ * Copyright (c) 2015-2017 Research Organization for Information Science
  *                         and Technology (RIST). All rights reserved.
  * Copyright (c) 2015      Cisco Systems, Inc.  All rights reserved.
  * $COPYRIGHT$
@@ -69,7 +69,7 @@ static int init(void)
 
 static void finalize(void)
 {
-    if (initialized) {
+    if (initialized && !refresh) {
         free(my_cred.credential);
     }
 }
@@ -95,7 +95,7 @@ static int get_my_cred(opal_process_name_t *my_id,
             my_cred.size = strlen(my_cred.credential)+1;
         }
         cred->method = strdup("munge");
-        cred->credential = strdup(my_cred.credential);
+        cred->credential = my_cred.credential;
         cred->size = my_cred.size;
     } else {
         rc = OPAL_ERROR;