Fix ObjectRef errors due to lua_isnil() (#10564)

Treat 'none' values as 'nil'
2020-11-04 21:43:18 +01:00
parent 39213bd00a
commit 72b93ec0d7
3 changed files with 40 additions and 43 deletions
--- a/src/script/common/helper.h
+++ b/src/script/common/helper.h
@@ -50,5 +50,8 @@ class LuaHelper
 	 * @return read value from Lua or default value if nil
 	 */
 	template <typename T>
-	static T readParam(lua_State *L, int index, const T &default_value);
+	static inline T readParam(lua_State *L, int index, const T &default_value)
+	{
+		return lua_isnoneornil(L, index) ? default_value : readParam<T>(L, index);
+	}
 };