(try_window_id): Compute BEG_UNCHANGED and END_UNCHANGED

if MODIFF > 1.

diff --git a/src/xdisp.c b/src/xdisp.c
index 662a37fd592485bc3b24a3897e0c3c9bc8df8b24..8563f015d0719a3792e3da673ac578e685654a8e 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -10020,7 +10020,7 @@ try_window_id (w)
      only if buffer has really changed.  The reason is that the gap is
      initially at Z for freshly visited files.  The code below would
      set end_unchanged to 0 in that case.  */
-  if (MODIFF > SAVE_MODIFF)
+  if (MODIFF > 1)
     {
       if (GPT - BEG < BEG_UNCHANGED)
        BEG_UNCHANGED = GPT - BEG;