From 88507b4ef9f94308d39f60b57dd2031fde9551ef Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Sat, 23 Nov 2013 12:26:00 -0600
Subject: [PATCH] [libpng16] Avoid a clang scanner warning in pngfix.c

---
 contrib/tools/pngfix.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/contrib/tools/pngfix.c b/contrib/tools/pngfix.c
index 30df33a42..3c70b81ad 100644
--- a/contrib/tools/pngfix.c
+++ b/contrib/tools/pngfix.c
@@ -3336,6 +3336,8 @@ read_callback(png_structp png_ptr, png_bytep buffer, size_t count)
             /* FALL THROUGH */
 
          default:
+            assert(chunk != NULL);
+
             /* NOTE: the arithmetic below overflows and gives a large positive
              * png_uint_32 value until the whole chunk data has been written.
              */