Method persist

src/lua-engine.cpp:177–182

		if(data) delete data;
	}
	void persist() {
		persisted = true;
		FILE* outf = fopen(filename.c_str(),"wb");
		fwrite(data->buf(),1,data->size(),outf);
		fclose(outf);
	}
	void ensureLoad() {
		if(data) return;
		persisted = true;