Sent last global variables' patchs

- There is, from now on, no more known global variables error in the repository! (not 100% guaranteed)

mods/snow/src/nodes.lua

@@ -66,7 +66,7 @@ end
 	
 	--Christmas easter egg
 	minetest.register_on_mapgen_init( function()
-		if skins then
+		if minetest.get_modpath("skins") ~= nil then
 			skins.add("character_snow_man")
 		end
 	end