fix crash :-/

I am stupid

mods/ENTITIES/mcl_falling_nodes/init.lua

@@ -53,7 +53,7 @@ local deal_falling_damage = function(self, dtime)
 						local helmet = inv:get_stack("armor", 2)
 						if has_mcl_armor and not helmet:is_empty() then
 							hp = hp/4*3
-							if not his_creative_enabled(name) then
+							if not is_creative_enabled(name) then
 								helmet:add_wear(65535/helmet:get_definition().groups.mcl_armor_uses) --TODO: be sure damage is exactly like mc (informations are missing in the mc wiki)
 								inv:set_stack("armor", 2, helmet)
 							end