Index: libgd-2.2.5/src/gd_gif_in.c
===================================================================
--- libgd-2.2.5.orig/src/gd_gif_in.c	2018-01-22 15:19:35.417382486 +0100
+++ libgd-2.2.5/src/gd_gif_in.c	2018-01-22 15:21:28.683291084 +0100
@@ -335,11 +335,6 @@ terminated:
 		return 0;
 	}
 
-	if(!im->colorsTotal) {
-		gdImageDestroy(im);
-		return 0;
-	}
-
 	/* Check for open colors at the end, so
 	 * we can reduce colorsTotal and ultimately
 	 * BitsPerPixel */
@@ -351,6 +346,11 @@ terminated:
 		}
 	}
 
+	if(!im->colorsTotal) {
+		gdImageDestroy(im);
+		return 0;
+	}
+
 	return im;
 }
 
@@ -447,7 +447,7 @@ static int
 GetCode_(gdIOCtx *fd, CODE_STATIC_DATA *scd, int code_size, int flag, int *ZeroDataBlockP)
 {
 	int i, j, ret;
-	unsigned char count;
+	int count;
 
 	if(flag) {
 		scd->curbit = 0;