gif_deanimate(): Confirm we've got an image before trying to write it
authorFabian Keil <fk@fabiankeil.de>
Sat, 6 Feb 2021 11:13:32 +0000 (12:13 +0100)
committerFabian Keil <fk@fabiankeil.de>
Sun, 21 Feb 2021 16:30:16 +0000 (17:30 +0100)
Saves a pointless buf_copy() call.

deanimate.c

index b0f3f1f..bc64de6 100644 (file)
@@ -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;
 
          /*