From a3e3d2d70d16e5f008920be051add6b9ffd3e110 Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Tue, 28 Aug 2018 20:52:16 +0200
Subject: [PATCH] Return UndefinedOptionFlag instead of -1.

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

diff --git a/MagickCore/option.c b/MagickCore/option.c
index 925ffeb86..3beca317d 100644
--- a/MagickCore/option.c
+++ b/MagickCore/option.c
@@ -2442,7 +2442,7 @@ MagickExport ssize_t GetCommandOptionFlags(const CommandOption option,
     option_types;
 
   if ((options == (const char *) NULL) || (*options == '\0'))
-    return(-1);
+    return(UndefinedOptionFlag);
   option_info=GetOptionInfo(option);
   if (option_info == (const OptionInfo *) NULL)
     return(UndefinedOptionFlag);
-- 
2.40.0