VAAPI-XCB: close display connection with X-server after flushing.

modules/codec/avcodec/vaapi_x11.c

@@ -368,9 +368,6 @@ void CloseVaapiX11(vlc_object_t *obj)
         vlc_va_Terminate(sys->vaconn);
     }
 
-    if (sys->x11display)
-        XCloseDisplay(sys->x11display);
-
     if (sys->conn)
     {
         /* show the default cursor */
@@ -380,6 +377,9 @@ void CloseVaapiX11(vlc_object_t *obj)
         xcb_disconnect(sys->conn);
     }
 
+    if (sys->x11display)
+        XCloseDisplay(sys->x11display);
+
     if (sys->embed)
         vout_display_DeleteWindow (vd, sys->embed);