Commit 4decb2103 for imagemagick.org

commit 4decb210339ac404084e3189191efcde5986e989
Author: Dirk Lemstra <dirk@lemstra.org>
Date:   Sat Oct 24 12:12:17 2026 +0200

    Minor optimization.

diff --git a/coders/gif.c b/coders/gif.c
index fe0a81099..fe41b6a3a 100644
--- a/coders/gif.c
+++ b/coders/gif.c
@@ -888,6 +888,8 @@ static ssize_t ReadBlobBlock(Image *image,unsigned char *data)
   count=ReadBlob(image,1,&block_count);
   if (count != 1)
     return(0);
+  if (block_count == 0)
+    return(0);
   count=ReadBlob(image,(size_t) block_count,data);
   if (count != (ssize_t) block_count)
     return(0);