* src/useradd.c: The ID argument of audit_logger is an unsigned

	* src/useradd.c: The ID argument of audit_logger is an unsigned
	int. Use AUDIT_NO_ID instead of -1.
	* src/useradd.c: Cast the parsed GID/UID to a gid_t/uid_t.
	* src/useradd.c: The size argument of fgets is an int, not a
	size_t.
	* src/useradd.c: Cast number of days to a long integer.
	* src/useradd.c: Use SHADOW_SP_FLAG_UNSET for the initial
	value of spent.sp_flag.
	* src/useradd.c: Use a %lu format and cast group and user IDs to
	unsigned long integers.