utf8 in resoueses does not recognized

[white-dragon]

for example:
URxvt.tabbedex.tabbar-timeouts: 0:⣿:2:⠿:4:⠛:6:⠉

patch is simple:

+++ tabbedex	2019-12-29 21:02:07.025578848 +0300
@@ -1452,6 +1452,7 @@
 	my ($rs, $name, $default) = @_;
 	my ($root, $extname, $prefix) = @$rs;
 	my $value = $root->x_resource("%.$name");
+	utf8::decode $value if defined $value;
 	if (defined $value || !defined $prefix ||
 	    !defined($value = $root->x_resource("$prefix.$name"))) {
 		return $value // $default;