Globalize bedrock generation position

mods/PLAYER/playerplus/depends.txt

@@ -1,2 +1,3 @@
+mcl_init
 mcl_core
 3d_armor?

mods/PLAYER/playerplus/init.lua

@@ -116,13 +116,13 @@ minetest.register_globalstep(function(dtime)
 		end
 
 		-- Apply black sky in the Void and deal Void damage
-		if pos.y < -64 then
+		if pos.y < mcl_vars.bedrock_overworld_max then
 			-- Player reached the void, set black sky box
 			player:set_sky("#000000", "plain")
 		else
 			player:set_sky(nil, "regular")
 		end
-		if pos.y < -64 -64 then
+		if pos.y < mcl_vars.bedrock_overworld_min - 65 then
 			-- Player is deep into the void, deal void damage
 			if player:get_hp() > 0 then
 				player:set_hp(player:get_hp() - 4)