Return value of uc_wqueue_clear wasn't initialized

src/wqueue.c

@@ -76,7 +76,7 @@ void uc_wqueue_init(struct UCWQueue *wqueue, struct IOMux *mux)
 int uc_wqueue_clear(struct UCWQueue *wqueue)
 {
     struct MBuf *buf;
-    int rc;
+    int rc = 0;
 
     while ((buf = uc_mbuf_dequeue(&wqueue->queue)) != NULL) {
         uc_mbuf_free(buf);