minor fixes

exhaust.lua

@@ -1,10 +1,14 @@
+
+local exhaust_tick = 1000*1000  -- 1 second
+
 local timestamp = {}
+
 stamina.register_on_exhaust_player(function(player, change, reason)
 	if type(player) ~= "userdata" or reason == "punch" or change < stamina.settings.exhaust_craft then return end
 	local now = minetest.get_us_time()
 	local name = player:get_player_name()
 	if timestamp[name] then
-		if now - timestamp[name] > 999999 then
+		if now - timestamp[name] >= exhaust_tick then
 			if (stamina.get_saturation(player) or 0) <= stamina.settings.starve_lvl then
 				timestamp[name] = now
 				player:set_hp(player:get_hp() - 1, "exhaust")

init.lua

@@ -10,7 +10,7 @@ dofile(MP .. "/anticheat/inv_move.lua")
 dofile(MP.."/alias.lua")
 
 -- warning message for default password (if set)
-if minetest.settings:get("default_password") then
+if minetest.settings:get("default_password") ~= "" then
 	dofile(MP.."/default_password_warn.lua")
 end
 
@@ -208,4 +208,6 @@ if minetest.get_modpath("digistuff") then
 end
 
 -- stamina extras
-dofile(MP.."/exhaust.lua")
+if minetest.global_exists("stamina") then
+	dofile(MP.."/exhaust.lua")
+end