* libmisc/age.c: fork() and wait return a pid_t, not an int.

	* libmisc/age.c: fork() and wait return a pid_t, not an int.
	* libmisc/age.c: Avoid implicit conversion of pointers to
	booleans.
	* libmisc/age.c: Avoid assignments in comparisons.
	* libmisc/age.c: Ignore the return value of printf(), puts(),
	fputs() and fflush().
	* libmisc/age.c: Add brackets and parenthesis.
	* libmisc/age.c: Cast the return value of time() to long and
	converted to a date.