bug#52378: 28.0.50; [PATCH] Reinstate a guard on compute_window_start()

[dick.r.chiang@gmail.com]

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From c0d3b2f75cd1ef0d4b45442ab073d8cd0a448a08 Mon Sep 17 00:00:00 2001
From: dickmao <dick.r.chiang@gmail.com>
Date: Wed, 8 Dec 2021 16:11:34 -0500
Subject: [PATCH] A common error

* src/xdisp.c (compute_window_start_on_continuation_line):
Align code with comment.
---
 src/xdisp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index 0ff6286af74..0fed93106df 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -18088,7 +18088,7 @@ compute_window_start_on_continuation_line (struct window *w)
          case point will not be visible with any window start we
          compute.  */
       if (IT_CHARPOS (it) <= PT
-	  || (CHARPOS (start_pos) - IT_CHARPOS (it)
+	  && (CHARPOS (start_pos) - IT_CHARPOS (it)
 	      /* PXW: Do we need upper bounds here?  */
 	      < WINDOW_TOTAL_LINES (w) * WINDOW_TOTAL_COLS (w)))
 	{
-- 
2.26.2


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