s3:idmap: don't log missing range config if range checking not requested

s3:idmap: don't log missing range config if range checking not requested

idmap_init_domain() is called with check_range == false from
idmap_passdb_domain(). In this case, we usually don't have an
idmap range at all, and we don't want to level 1 debug
messages complaining about the fact are irritating at least.

This patch removes the debug in the case of check_range == false.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=10737

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>