DxDLL.csの修正

DX Library Copyright (C) 2001-2008 Takumi Yamada. 
 
        [DllImport("DxLib.dll", EntryPoint = "dx_GetHitKeyStateAll")]
        extern static int dx_GetHitKeyStateAll([Out] byte[] KeyStateBuf);
        public static int GetHitKeyStateAll(out byte[] KeyStateBuf)
        {
            byte[] KeyStateBuf_ = new byte[256];
            dx_GetHitKeyStateAll(KeyStateBuf_);
            KeyStateBuf = KeyStateBuf_;
            return(0);
        }