Method nullStr

src/common/classes/MetaString.h:80–80

	FB_SIZE_T length() const { return count; }
	const char* c_str() const { return data; }
	const char* nullStr() const { return (count == 0 ? NULL : data); }
	bool isEmpty() const { return count == 0; }
	bool hasData() const { return count != 0; }