From 0522f269e00ecdfb7ff594baef4a543457cddedb Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Thu, 29 Dec 2011 10:02:24 -0600
Subject: [PATCH] [libpng16] Update png_err() to use new typecast.

---
 pngerror.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pngerror.c b/pngerror.c
index c2b8c73e0..5a5a73ab9 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -96,7 +96,7 @@ png_err,(png_const_structrp png_ptr),PNG_NORETURN)
     * will crash in this case.
     */
    if (png_ptr != NULL && png_ptr->error_fn != NULL)
-      (*(png_ptr->error_fn))(png_ptr, "");
+      (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), "");
 
    /* If the custom handler doesn't exist, or if it returns,
       use the default handler, which will not return. */