* libmisc/log.c: Avoid assignments in comparisons.

	* libmisc/log.c: Avoid assignments in comparisons.
	* libmisc/log.c: Add brackets and parenthesis.
	* libmisc/log.c: read() returns a ssize_t (note size_t).
	* libmisc/log.c: Avoid implicit conversion of pointers to
	booleans.
	* libmisc/log.c: Ignore return value of time() when use with a
	non NULL argument.