From 56bd777c614253bc6ad4dca20e109be6ab61df48 Mon Sep 17 00:00:00 2001
From: cristy <cristy@aa41f4f7-0bf4-0310-aa73-e5a19afd5a74>
Date: Sun, 21 Dec 2014 23:32:33 +0000
Subject: Create IsValidColormapIndex function

This function will be used to avoid a memory leak in rle.

git-svn-id: https://subversion.imagemagick.org/subversion/ImageMagick/branches/ImageMagick-6@17379 aa41f4f7-0bf4-0310-aa73-e5a19afd5a74
origin: http://trac.imagemagick.org/changeset/17379 and http://trac.imagemagick.org/changeset/17382

diff --git a/magick/colormap-private.h b/magick/colormap-private.h
index 03c0b67..41da718 100644
--- a/magick/colormap-private.h
+++ b/magick/colormap-private.h
@@ -36,6 +36,20 @@ static inline IndexPacket ConstrainColormapIndex(Image *image,
   return((IndexPacket) 0);
 }
 
+static inline MagickBooleanType IsValidColormapIndex(Image *image,
+  const ssize_t index,IndexPacket *target,ExceptionInfo *exception)
+{
+  if ((index < 0) || (index >= (ssize_t) image->colors))
+    {
+      (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
+        "InvalidColormapIndex","`%s'",image->filename);
+      *target=(IndexPacket) 0;
+      return(MagickFalse);
+    }
+  *target=(IndexPacket) index;
+  return(MagickTrue);
+}
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }
 #endif
-- 
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