From d4311d416d80c4a3fb52c03669cce9cda1ec1d54 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Sun, 18 Mar 2012 23:03:10 +0000
Subject: [PATCH]

---
 MagickCore/option.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MagickCore/option.c b/MagickCore/option.c
index 0d61e000e..18a1865b0 100644
--- a/MagickCore/option.c
+++ b/MagickCore/option.c
@@ -2538,6 +2538,8 @@ MagickExport ssize_t ParsePixelChannelOption(const char *channels)
     channel;
 
   GetMagickToken(channels,NULL,token);
+  if ((*token == ';') || (*token == '|'))
+    return(RedPixelChannel);
   channel=ParseCommandOption(MagickPixelChannelOptions,MagickTrue,token);
   if (channel >= 0)
     return(channel);
-- 
2.40.0