From 50a48c1294c561fa118f1d3366b92f174f3bdfa7 Mon Sep 17 00:00:00 2001
From: Harald Oehlmann <oehhar@sourceforge.net>
Date: Mon, 22 Aug 2016 19:08:00 +0200
Subject: [PATCH] Silence signed compiler warnings

---
 backend/gif.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/backend/gif.c b/backend/gif.c
index 7ebd43d6..8c7c5908 100644
--- a/backend/gif.c
+++ b/backend/gif.c
@@ -491,9 +491,9 @@ int gif_pixel_plot(struct zint_symbol *symbol, int image_height, int image_width
 
     /* call lzw encoding */
     byte_out = gif_lzw(
-        lzwoutbuf,
+        (unsigned char *) lzwoutbuf,
         image_height * image_width,
-        rotated_bitmap,
+        (unsigned char *) rotated_bitmap,
         image_height * image_width);
     if (byte_out <= 0)
     {