Re: Fix a failure of pg_dump with !HAVE_LIBZ

Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp> writes:
> The warning says that it makes uncompressed archive but it really
> doesn't since workers die unexpectedly from the succeeding
> errors. This is because that compressLevel is corrected in
> ReadHead(), where too late for it to be propagated to workers.
> One reasonable place would be where the default value of
> compressLevel is set in main().

Yeah, agreed.  I also noticed that you get the WARNING even when you
did not ask for compression, which seems rather unhelpful and annoying.
So I suppressed it by making the default be 0 not Z_DEFAULT_COMPRESSION
when we don't HAVE_LIBZ.
        regards, tom lane