98_LW12.pm: fixed Warning line 478

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@9268 2b470e98-0d58-463d-a4d8-8e2adae1ed80

fhem/contrib/98_LW12.pm

@@ -475,7 +475,7 @@ sub LW12_updateStatus( $ ) {
 	return if IsDisabled($name);
 	
 	my $res = LW12_Write( $hash, "\x{EF}\x{01}\x{77}" );	
-	if ($res != 0){
+	if (hex($res) != 0){
     	$res = uc($res);
     	my @colors = ( $res =~ m/..?/g );