--- vdr-1.5.5-orig/tools.c	2007-06-23 15:38:30.000000000 +0200
+++ vdr-1.5.5/tools.c	2007-06-28 21:10:58.000000000 +0200
@@ -685,7 +685,7 @@
   int n = 0;
   while (*s && --Size > 0) {
         if (cCharSetConv::SystemCharacterTable())
-           *a++ = *s++;
+           *a++ = (unsigned char)(*s++);
         else {
            int sl = Utf8CharLen(s);
            *a++ = Utf8CharGet(s, sl);