qt: vlm: Do not rely on config.h defines when generating moc

This causes recent moc versions to consider the file empty, thus not
generating anything.

modules/gui/qt/dialogs/vlm.cpp

@@ -27,9 +27,8 @@
 # include "config.h"
 #endif
 
-#include "dialogs/vlm.hpp"
-
 #ifdef ENABLE_VLM
+#include "dialogs/vlm.hpp"
 #include "dialogs/open.hpp"
 #include "dialogs/sout.hpp"
 #include "util/qt_dirs.hpp"

modules/gui/qt/dialogs/vlm.hpp

@@ -29,8 +29,6 @@
 # include "config.h"
 #endif
 
-#ifdef ENABLE_VLM
-
 #include <vlc_vlm.h>
 
 #include "ui/vlm.h"
@@ -226,5 +224,3 @@ private:
 };
 
 #endif
-
-#endif