From d675c669c8250b7da55747c81a5bd01504449e6e Mon Sep 17 00:00:00 2001
From: Peter Kasting <pkasting@chromium.org>
Date: Mon, 26 Jul 2021 21:45:09 -0700
Subject: [PATCH] Fix an instance of -Wunused-but-set-variable.

See https://github.com/glennrp/libpng/pull/388
---
 pngread.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/pngread.c b/pngread.c
index 8fa7d9f16..5ab922403 100644
--- a/pngread.c
+++ b/pngread.c
@@ -3452,7 +3452,6 @@ png_image_read_background(png_voidp argument)
 
             for (pass = 0; pass < passes; ++pass)
             {
-               png_bytep row = png_voidcast(png_bytep, display->first_row);
                unsigned int     startx, stepx, stepy;
                png_uint_32      y;
 
@@ -3557,8 +3556,6 @@ png_image_read_background(png_voidp argument)
 
                         inrow += 2; /* gray and alpha channel */
                      }
-
-                     row += display->row_bytes;
                   }
                }
             }