From 1385a8061f0a187e18ba79540481e7698f2e0667 Mon Sep 17 00:00:00 2001
From: Kenichi Handa <handa@m17n.org>
Date: Tue, 24 Apr 2007 11:35:15 +0000
Subject: [PATCH] (font_at): If the window W is not on a window system, return
 Qnil.

---
 src/font.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/font.c b/src/font.c
index b0838cee1c0..e6d38dee2fb 100644
--- a/src/font.c
+++ b/src/font.c
@@ -2888,6 +2888,8 @@ font_at (c, pos, face, w, object)
   int dummy;
 
   f = XFRAME (w->frame);
+  if (! FRAME_WINDOW_P (f))
+    return Qnil;
   if (! face)
     {
       if (STRINGP (object))
-- 
2.39.5