Ported get_layer_range() to C

xs/t/02_object.t

@@ -0,0 +1,12 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Slic3r::XS;
+use Test::More tests => 1;
+
+is_deeply Slic3r::Object::XS::get_layer_range([ 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 ], 39, 69),
+    [2, 6], 'get_layer_range';
+
+__END__