Ivan Leo : quartz: Fix media type detection.

[Alexandre Julliard]

Module: wine
Branch: refs/heads/master
Commit: 16449744914a400f876fa24eb3829a6f01f08e5c
URL:    http://source.winehq.org/git/?p=wine.git;a=commit;h=16449744914a400f876fa24eb3829a6f01f08e5c

Author: Ivan Leo <ivanleo at gmail.com>
Date:   Wed Jun 21 21:49:35 2006 +0100

quartz: Fix media type detection.

---

 dlls/quartz/filesource.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/quartz/filesource.c b/dlls/quartz/filesource.c
index 68ed1b9..a44ca36 100644
--- a/dlls/quartz/filesource.c
+++ b/dlls/quartz/filesource.c
@@ -82,14 +82,14 @@ static unsigned char byte_from_hex_char(
     case '7':
     case '8':
     case '9':
-        return wHex - '0';
+        return (wHex - '0') & 0xf;
     case 'a':
     case 'b':
     case 'c':
     case 'd':
     case 'e':
     case 'f':
-        return wHex - 'a' + 10;
+        return (wHex - 'a' + 10) & 0xf;
     default:
         return 0;
     }