Merge pull request #1370 from curlymorphic/issue1242

Fix for issue 1242 Buffer size frame rate should not cause a delay/latency at the start of rendered audio file.

src/core/ProjectRenderer.cpp

@@ -160,6 +160,8 @@ void ProjectRenderer::run()
 
 
 	Engine::getSong()->startExport();
+    //skip first empty buffer
+    Engine::mixer()->nextBuffer();
 
 	Song::playPos & pp = Engine::getSong()->getPlayPos(
 							Song::Mode_PlaySong );