extend msg queue test

lib/test/common/msg_queue_test.cc

@@ -71,6 +71,10 @@ int main(int argc, char **argv) {
 
   pthread_join(thread, NULL);
 
+  if (q.size() != 0 || q.size_bytes() != 0) {
+    result = false;
+  }
+
   if(result) {
     printf("Passed\n");
     exit(0);