[Privoxy-commits] [privoxy] 03/06: gif_deanimate(): Confirm we've got an image before trying to write it

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commit 344963815c5b29449042487d942fc12f43144295
Author: Fabian Keil <fk at fabiankeil.de>
AuthorDate: Sat Feb 6 12:13:32 2021 +0100

    gif_deanimate(): Confirm we've got an image before trying to write it
    
    Saves a pointless buf_copy() call.
---
 deanimate.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/deanimate.c b/deanimate.c
index b0f3f1f8..bc64de63 100644
--- a/deanimate.c
+++ b/deanimate.c
@@ -383,9 +383,11 @@ int gif_deanimate(struct binbuffer *src, struct binbuffer *dst, int get_first_im
       switch(buf_getbyte(src, 0))
       {
          /*
-          *  End-of-GIF Marker: Append current image and return
+          * End-of-GIF Marker: Append current image if we got
+          * one and return.
           */
       case 0x3b:
+         if (image->size == 0) goto failed;
          goto write;
 
          /*

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