[loading window] Theme loading should also list itself in the loading window.

src/StepMania.cpp

@@ -1011,7 +1011,7 @@ int main(int argc, char* argv[])
 	GAMESTATE	= new GameState;
 
 	// This requires PREFSMAN, for PREFSMAN->m_bShowLoadingWindow.
-	LoadingWindow *pLoadingWindow = LoadingWindow::Create();
+	pLoadingWindow = LoadingWindow::Create();
 	if(pLoadingWindow == NULL)
 		RageException::Throw("%s", COULDNT_OPEN_LOADING_WINDOW.GetValue().c_str());