--- libgd-2.2.4/src/gd_gif_in.c.orig	2017-07-29 10:59:57.297089410 -0400
+++ libgd-2.2.4/src/gd_gif_in.c	2017-07-29 11:01:10.981884723 -0400
@@ -216,6 +216,9 @@ BGD_DECLARE(gdImagePtr) gdImageCreateFro
 
 	gdImagePtr im = 0;
 
+	memset(ColorMap, 0, 3 * MAXCOLORMAPSIZE);
+	memset(localColorMap, 0, 3 * MAXCOLORMAPSIZE);
+
 	if(!ReadOK(fd, buf, 6)) {
 		return 0;
 	}