From b94d24eb25e6227a6bb386ca65119444f65a3d97 Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Fri, 21 Jan 2011 22:17:18 -0600
Subject: [master] Changed argument of png_get_io_ptr() back to png_struct

because we promised not to change its signature, so it can be used
safely in configure scripts to detect libpng.
---
 pngrtran.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'pngrtran.c')

diff --git a/pngrtran.c b/pngrtran.c
index 36c334802..a475f9a9a 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -2290,7 +2290,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
 
    png_debug(1, "in png_do_rgb_to_gray");
 
-   if (
+   if (!(row_info->color_type & PNG_COLOR_MASK_PALETTE) &&
       (row_info->color_type & PNG_COLOR_MASK_COLOR))
    {
       png_uint_32 rc = png_ptr->rgb_to_gray_red_coeff;
-- 
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