Fix duckduckgo imagemagick crash

* image.c (imagemagick_compute_animated_image): Don't crash if we
have an animation with different-sized images.

Fixes: debbugs:15313

1 files changed, 1 insertions, 1 deletions

diff --git a/src/image.c b/src/image.c
index 167ee2da303..91038dd480a 100644
--- a/src/image.c
+++ b/src/image.c
@@ -8093,7 +8093,7 @@ imagemagick_compute_animated_image (MagickWand *super_wand, int ino)
             {
               /* Sanity check.  This shouldn't happen, but apparently
                  also does in some pictures.  */
-              if (x + source_left > dest_width)
+              if (x + source_left > dest_width - 1)
                 break;
               /* Normally we only copy over non-transparent pixels,
                  but if the disposal method is "Background", then we