From bf8360aed29c9011653cfb65c61addcc3fa092ac Mon Sep 17 00:00:00 2001
From: Eli Zaretskii <eliz@gnu.org>
Date: Thu, 16 Jan 1997 12:20:49 +0000
Subject: [PATCH] * (XMenuActivate): Don't allow non-positive menu coordinates.

---
 src/msdos.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/msdos.c b/src/msdos.c
index d809fffd46a..c961be34656 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -2114,6 +2114,12 @@ XMenuActivate (Display *foo, XMenu *menu, int *pane, int *selidx,
   /* Just in case we got here without a mouse present...  */
   if (have_mouse <= 0)
     return XM_IA_SELECT;
+  /* Don't allow non-positive x0 and y0, lest the menu will wrap
+     around the display.  */
+  if (x0 <= 0)
+    x0 = 1;
+  if (y0 <= 0)
+    y0 = 1;
 
   state = alloca (menu->panecount * sizeof (struct IT_menu_state));
   screensize = screen_size * 2;
-- 
2.39.2