From 718128d2a38d3cca1b3eac19a96c6ce3b31e63d2 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Wed, 24 Sep 2014 12:29:52 +0000
Subject: [PATCH]

---
 MagickCore/image.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/MagickCore/image.c b/MagickCore/image.c
index 800e25b0a..64f78cf5d 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -2880,8 +2880,12 @@ MagickExport MagickBooleanType SetImageAlpha(Image *image,const Quantum alpha,
       }
     for (x=0; x < (ssize_t) image->columns; x++)
     {
-      if (GetPixelReadMask(image,q) != 0)
-        SetPixelAlpha(image,alpha,q);
+      if (GetPixelReadMask(image,q) == 0)
+        {
+          q+=GetPixelChannels(image);
+          continue;
+        }
+      SetPixelAlpha(image,alpha,q);
       q+=GetPixelChannels(image);
     }
     if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
-- 
2.50.1