Behavior tweaks when eating "empty" food (#46)

- Allow eating food which doesn't restore saturation when the player is full
- Don't apply poison effect when eating food that isn't actually poisonous

init.lua

@@ -480,8 +480,8 @@ function minetest.do_item_eat(hp_change, replace_with_item, itemstack, player, p
 	end
 
 	local level = stamina.get_saturation(player) or 0
-	if level >= settings.visual_max then
-		-- don't eat if player is full
+	if level >= settings.visual_max and hp_change > 0 then
+		-- don't eat if player is full and item provides saturation
 		return itemstack
 	end
 
@@ -498,8 +498,7 @@ function minetest.do_item_eat(hp_change, replace_with_item, itemstack, player, p
 	if hp_change > 0 then
 		stamina.change_saturation(player, hp_change)
 		stamina.set_exhaustion(player, 0)
-	else
-		-- assume hp_change < 0.
+	elseif hp_change < 0 then
 		stamina.poison(player, -hp_change, settings.poison_tick)
 	end