https://github.com/ImageMagick/ImageMagick/issues/191

diff --git a/coders/jpeg.c b/coders/jpeg.c
index 6a848cbd71fa2bccc05d78fc200efbe8aaaca56a..73f6e49d8a50431ce0fee542bb5b6d96bbd1ecba 100644 (file)
--- a/coders/jpeg.c
+++ b/coders/jpeg.c
@@ -1261,8 +1261,7 @@ static Image *ReadJPEGImage(const ImageInfo *image_info,
     if (AcquireImageColormap(image,StringToUnsignedLong(option),exception)
          == MagickFalse)
       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
-  if ((jpeg_info.output_components == 1) &&
-      (jpeg_info.quantize_colors == MagickFalse))
+  if ((jpeg_info.output_components == 1) && (jpeg_info.quantize_colors == 0))
     {
       size_t
         colors;
@@ -1329,7 +1328,7 @@ static Image *ReadJPEGImage(const ImageInfo *image_info,
         return(GetFirstImageInList(image));
       return(DestroyImage(image));
     }
-  if (jpeg_info.quantize_colors != MagickFalse)
+  if (jpeg_info.quantize_colors != 0)
     {
       image->colors=(size_t) jpeg_info.actual_number_of_colors;
       if (jpeg_info.out_color_space == JCS_GRAYSCALE)