From: Cristy <urban-warrior@imagemagick.org>
Date: Tue, 23 Jan 2018 17:56:28 +0000 (-0500)
Subject: ...
X-Git-Tag: 7.0.7-23~289
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=bdac2c4462665b8efac81e65c784329b5d755934;p=imagemagick

...
---

diff --git a/MagickCore/composite.c b/MagickCore/composite.c
index 5b8604406..5d75eb5fb 100644
--- a/MagickCore/composite.c
+++ b/MagickCore/composite.c
@@ -1762,7 +1762,7 @@ MagickExport MagickBooleanType CompositeImage(Image *image,
                 break;
               }
             pixel=0.0;
-            if ((IsNaN(Da) != MagickFalse) && (IsNaN(Sca) != MagickFalse))
+            if ((IsNaN(Da) == MagickFalse) && (IsNaN(Sca) == MagickFalse))
               pixel=QuantumRange*gamma*(Sa*Da-Sa*Da*MagickMin(1.0,(1.0-Dca/Da)*
                 Sa/Sca)+Sca*(1.0-Da)+Dca*(1.0-Sa));
             break;