(no commit message)

diff --git a/coders/histogram.c b/coders/histogram.c
index d431cad015b7998f567bff7edf639f641ac91915..16008c75bf7478b027b40033b5875273b2fbbbaf 100644 (file)
--- a/coders/histogram.c
+++ b/coders/histogram.c
@@ -343,7 +343,7 @@ static MagickBooleanType WriteHISTOGRAMImage(const ImageInfo *image_info,
   */
   histogram=(MagickPixelPacket *) RelinquishMagickMemory(histogram);
   option=GetImageOption(image_info,"histogram:unique-colors");
-  if ((option != (const char *) NULL) && (IsMagickTrue(option) != MagickFalse))
+  if ((option == (const char *) NULL) || (IsMagickTrue(option) != MagickFalse))
     {
       FILE
         *file;