patch 9.2.0366: pum: flicker when updating pum in place

Problem:  pum: flicker when updating pum in place
Solution: Skip update_screen() when the popup menu is redrawn
          at the same position (Yasuhiro Matsumoto).

closes: #20015

Signed-off-by: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/insexpand.c

@@ -1828,8 +1828,9 @@ ins_compl_show_pum(void)
     if (!pum_wanted() || !pum_enough_matches())
 	return;
 
-    // Update the screen later, before drawing the popup menu over it.
-    pum_call_update_screen();
+    // Avoid redrawing the screen under a pum that stays in place.
+    if (!pum_redraw_in_same_position())
+	pum_call_update_screen();
 
     if (compl_match_array == NULL)
 	// Need to build the popup menu list.

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    366,
 /**/
     365,
 /**/