Fix old gcc build

diff --git a/src/script/lua_api/l_async_events.h b/src/script/lua_api/l_async_events.h
index 4aaf3bdfe65b91e63f315d64fbfa6e7fb82bcbfa..347d9c0fcc9d71907db5e53769815c2db1e0da70 100644 (file)
--- a/src/script/lua_api/l_async_events.h
+++ b/src/script/lua_api/l_async_events.h
@@ -132,7 +132,7 @@ private:
 
 /** asynchornous thread and job management **/
 class AsyncEngine {
-       friend AsyncWorkerThread;
+       friend class AsyncWorkerThread;
 public:
        /**
         * default constructor