ignore video region when it is disabled!

git-svn-id: https://xpra.org/svn/Xpra/trunk@12758 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/server/window/window_video_source.py

@@ -552,7 +552,7 @@ def send_nonvideo(regions=regions, encoding=coding, exclude_region=None, get_bes
             return send_nonvideo()
 
         vr = self.video_subregion.rectangle
-        if not vr:
+        if not vr or not self.video_subregion.enabled:
             sublog("no video region, we may use the video encoder for something else")
             WindowSource.do_send_delayed_regions(self, damage_time, window, regions, coding, options)
             return