* src/lastlog.c: Use EXIT_FAILURE / EXIT_SUCCESS for exit()

	* src/lastlog.c: Use EXIT_FAILURE / EXIT_SUCCESS for exit()
	* src/lastlog.c: Added splint annotations.
	* src/lastlog.c: Avoid global pwent.
	* src/lastlog.c: Cast ID to ulongs and use ulong formats for IDs.
	* src/lastlog.c: Avoid assignment in comparisons.
	* src/lastlog.c: Ignore fclose() return value since the file is
	only opened for reading.