https://github.com/ImageMagick/ImageMagick/issues/562

diff --git a/coders/uil.c b/coders/uil.c
index beda560aae89ee23e5c2c4881e0e445e226de03c..1e83363ba631eec74e21c0108c394255f2b1c8b3 100644 (file)
--- a/coders/uil.c
+++ b/coders/uil.c
@@ -255,6 +255,8 @@ static MagickBooleanType WriteUILImage(const ImageInfo *image_info,Image *image,
             }
           }
         }
+      if (i != 0)
+        i--;
       (void) SetImageType(image,PaletteType,exception);
       colors=image->colors;
       if (transparent != MagickFalse)