From: Roland Illig <roland.illig@gmx.de>
Date: Sun, 18 Feb 2018 16:52:42 +0000 (+0100)
Subject: Fix undefined behavior when calling isdigit (#988)
X-Git-Tag: 7.0.7-23~9
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=50c202d641d742ee440ca75e4fd3990378f35910;p=imagemagick

Fix undefined behavior when calling isdigit (#988)
---

diff --git a/MagickCore/delegate.c b/MagickCore/delegate.c
index ce13fb52a..7ecc62def 100644
--- a/MagickCore/delegate.c
+++ b/MagickCore/delegate.c
@@ -931,7 +931,7 @@ RestoreMSCWarning
   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++)
+    number=isdigit((int) ((unsigned char) *p)) ? MagickTrue : MagickFalse,p++)
   {
     /*
       Interpret escape characters (e.g. Filename: %M).