extend msg queue test

lib/test/common/msg_queue_test.cc

@@ -49,8 +49,8 @@ void* write_thread(void *a) {
 
 int main(int argc, char **argv) {
   bool                 result;
-  rlc_tx_queue            q;
-  byte_buffer_t *b;
+  rlc_tx_queue         q;
+  byte_buffer_t       *b;
   pthread_t            thread;
   args_t               args;
   u_int32_t            r;
@@ -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);