Added on_save_effect support for mobs

mods/ENTITIES/mcl_mobs/api.lua

@@ -109,6 +109,12 @@ function mob_class:get_staticdata()
 	end
 
 	tmp._mcl_potions = self._mcl_potions
+	if tmp._mcl_potions then
+		for name_raw, data in pairs(tmp._mcl_potions) do
+			local def = mcl_potions.registered_effects[name_raw:match("^_EF_(.+)$")]
+			if def and def.on_save_effect then def.on_save_effect(self.object) end
+		end
+	end
 
 	return minetest.serialize(tmp)
 end