From: Richard M. Stallman <rms@gnu.org>
Date: Sat, 20 Jul 2002 21:44:48 +0000 (+0000)
Subject: (redisplay_window): Test MODIFF to set buffer_unchanged_p.
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(redisplay_window): Test MODIFF to set buffer_unchanged_p.
---

diff --git a/src/xdisp.c b/src/xdisp.c
index 38457c569de..a271604aa8e 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -10170,6 +10170,7 @@ redisplay_window (window, just_this_one_p)
     = (!NILP (w->window_end_valid)
        && !current_buffer->clip_changed
        && END_UNCHANGED + BEG_UNCHANGED >= Z - BEG
+       && XFASTINT (w->last_modified) >= MODIFF
        && XFASTINT (w->last_overlay_modified) >= OVERLAY_MODIFF);
 
   /* When windows_or_buffers_changed is non-zero, we can't rely on