mc-3693-edit.c-Cleanup-unsafe-loop-optimizations-compiler-wa.patch

From ff06d173de8cf6ae34ad7548d95c6cbc513fbc47 Mon Sep 17 00:00:00 2001
From: Andreas Mohr <and@gmx.li>
Date: Tue, 6 Dec 2016 09:58:11 +0000
Subject: [PATCH] (edit.c) Cleanup unsafe-loop-optimizations compiler warning

Found by GCC 6.2.0.

edit.c: In function 'right_of_four_spaces':
edit.c:1367:5: error: cannot optimize possibly infinite loops [-Werror=unsafe-loop-optimizations]

edit.c: In function 'edit_backspace':
edit.c:2682:5: error: cannot optimize possibly infinite loops [-Werror=unsafe-loop-optimizations]

Signed-off-by: Andreas Mohr <and@gmx.li>
---
 src/editor/edit.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/editor/edit.c b/src/editor/edit.c
index 56ef4b5..1b55c5c 100644
--- a/src/editor/edit.c
+++ b/src/editor/edit.c
@@ -1364,7 +1364,7 @@ right_of_four_spaces (WEdit * edit)
 {
     int i, ch = 0;
 
-    for (i = 1; i <= HALF_TAB_SIZE; i++)
+    for (i = HALF_TAB_SIZE; i > 0; i--)
         ch |= edit_buffer_get_byte (&edit->buffer, edit->buffer.curs1 - i);
 
     return (ch == ' ' && is_aligned_on_a_tab (edit));
@@ -2678,7 +2678,7 @@ edit_backspace (WEdit * edit, gboolean byte_delete)
     (void) byte_delete;
 #endif
 
-    for (i = 1; i <= char_length; i++)
+    for (i = char_length; i > 0; i--)
     {
         if (edit->mark1 >= edit->buffer.curs1)
         {