Corrected free calls for ITTI messages.

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4784 818b1a75-f10b-46b9-bf7c-635c3b92a50f

openair-cn/S1AP/s1ap_mme.c

@@ -168,7 +168,7 @@ void *s1ap_mme_thread(void *args)
                            ITTI_MSG_ID(received_message_p), ITTI_MSG_NAME(received_message_p));
             } break;
         }
-        free(received_message_p);
+        itti_free(ITTI_MSG_ORIGIN_ID(received_message_p), received_message_p);
         received_message_p = NULL;
     }
     return NULL;