Will Andrews abf6a03921 Fix an assert to tolerate spare parents with more than 2 children.
This can occur if a spare is being spared, which would yield three
children: the original pool drive, the previous spare, and the spare
that is replacing it.

MFC after:	1 week
Sponsored by:	Spectra Logic
Affects:	All ZFS versions starting 7 Jun 2006 (illumos 94de1d4c)
MFSpectraBSD:	r668345 on 2013/06/04 17:10:43
2014-09-18 14:02:25 +00:00
..
2014-07-01 06:43:15 +00:00
2014-07-01 06:43:15 +00:00