patch 7.4.2199

Problem:    In the GUI the cursor is hidden when redrawing any window,
            causing flicker.
Solution:   Only undraw the cursor when updating the window it's in.

src/gui_gtk_x11.c

@@ -6698,7 +6698,7 @@ check_copy_area(void)
      * we don't want it to be.	I'm not sure if it's correct to call
      * gui_dont_update_cursor() at this point but it works as a quick
      * fix for now. */
-    gui_dont_update_cursor();
+    gui_dont_update_cursor(TRUE);
 
     do
     {