cherry-pick from github.com/minetest/minetest_game> Doors: Fix uninitialized state variable

mods/doors/init.lua

@@ -140,6 +140,8 @@ function _doors.door_toggle(pos, clicker)
 		-- fix up lvm-placed right-hinged doors, default closed
 		if minetest.get_node(pos).name:sub(-2) == "_b" then
 			state = 2
+		else
+			state = 0
 		end
 	else
 		state = tonumber(state)