Re: [PATCH 1/1] Fix date checking in case if time was not initialized.

The test does _not_ fail.  That if condition does return -1 on Linux
and BSD, and making tm_to_time_t() return a failure, but the caller
goes on, ending up with the right values in year/month/date in the
tm struct, which is the primary thing the function is used for.

I said it wrong, test itself is not failed, but numerous is_date()
checks are failed due to incomplete time.