quartz: Fix media type detection.

16449744 · Ivan Leo · Alexandre Julliard · 41ee9853 · 16449744
Commit 16449744 authored Jun 21, 2006 by Ivan Leo Committed by Alexandre Julliard Jun 22, 2006
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filesource.c dlls/quartz/filesource.c +2 -2

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--- a/dlls/quartz/filesource.c
+++ b/dlls/quartz/filesource.c
@@ -82,14 +82,14 @@ static unsigned char byte_from_hex_char(WCHAR wHex)
    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;
    }