https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=29844

diff --git a/MagickCore/color.c b/MagickCore/color.c
index 5b7ab9e32b98a9f5c0e037e65d22d20e913c0ba5..b786fcf578fb65e2ecc5fe45625d3b822edddce6 100644 (file)
--- a/MagickCore/color.c
+++ b/MagickCore/color.c
@@ -1194,7 +1194,7 @@ MagickExport void ConcatenateColorComponent(const PixelInfo *pixel,
   if (channel == AlphaPixelChannel)
     {
       (void) FormatLocaleString(component,MagickPathExtent,"%.*g",
-        GetMagickPrecision(),(double) ClampToQuantum(QuantumScale*color));
+        GetMagickPrecision(),QuantumScale*ClampToQuantum(color));
       (void) ConcatenateMagickString(tuple,component,MagickPathExtent);
       return;
     }