#865: make_data_packet_cb MUST always be called from the encode threa…

…d! (fixes breakage caused by r9372)

git-svn-id: https://xpra.org/svn/Xpra/trunk@9463 3bb7dfac-3a0b-4e04-842a-767bc560f471

src/xpra/server/window_source.py

@@ -1196,7 +1196,7 @@ def process_damage_region(self, damage_time, window, x, y, w, h, coding, options
         av_sync = options.get("av-sync", False)
         av_delay = self.av_sync_delay*int(av_sync)
         if not av_sync:
-            self.make_data_packet_cb(*item)
+            self.call_in_encode_thread(self.make_data_packet_cb, *item)
         else:
             #schedule encode via queue, after freezing the pixels:
             frozen = image.freeze()