From: Roland Illig <roland.illig@gmx.de>
Date: Sun, 18 Feb 2018 23:48:47 +0000 (+0100)
Subject: Fix undefined behavior when calling isdigit (#989)
X-Git-Tag: 7.0.7-23~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=fede9f9dd52a6793042c8744cf6fbf6cafa8565f;p=imagemagick

Fix undefined behavior when calling isdigit (#989)
---

diff --git a/MagickCore/property.c b/MagickCore/property.c
index 5ad1110b3..2841c0622 100644
--- a/MagickCore/property.c
+++ b/MagickCore/property.c
@@ -3396,7 +3396,7 @@ RestoreMSCWarning
   interpret_text=AcquireString(embed_text); /* new string with extra space */
   extent=MagickPathExtent;                     /* allocated space in string */
   number=MagickFalse;                       /* is last char a number? */
-  for (q=interpret_text; *p!='\0'; number=isdigit(*p) ? MagickTrue : MagickFalse,p++)
+  for (q=interpret_text; *p!='\0'; number=isdigit((int) ((unsigned char) *p)) ? MagickTrue : MagickFalse,p++)
   {
     /*
       Look for the various escapes, (and handle other specials)