Fix quarry rotation (#68)

Previously the model was rotated but the dig position of the quarry was
not updated. If the player did not restart the quarry through the
formspec, it dug at the previous location.

technic/machines/HV/quarry.lua

@@ -281,6 +281,20 @@ minetest.register_node("technic:quarry", {
 		reset_quarry(pos)
 		set_quarry_status(pos)
 	end,
+	on_rotate = function(pos, node, player, click, new_param2)
+		local meta = minetest.get_meta(pos)
+		if meta:get_int("enabled") == 1 then
+			return false
+		end
+
+		-- only allow rotation around y-axis
+		node.param2 = new_param2 % 4
+
+		minetest.swap_node(pos, node)
+		reset_quarry(pos)
+		set_quarry_status(pos)
+		return true
+	end,
 	after_place_node = function(pos, placer, itemstack)
 		minetest.get_meta(pos):set_string("owner", placer:get_player_name())
 		pipeworks.scan_for_tube_objects(pos)