Lua : add lua.Lua.tonumber

std/lua/Lua.hx

@@ -13,4 +13,5 @@ extern class Lua {
 	public static function tostring(v: Dynamic): String;
 	public static function ipairs<T>(t: Table<Int,T>): Void->T;
 	public static function pairs<A,B>(t: Table<A,B>): Void->A;
+	public static function tonumber(str:String, base:Int): Int;
 }