K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-07-12T03:52:05.685087Z
K 7
svn:log
V 286
Add assert to complement r302328.

AST must not execute with TDF_SBDRY or TDF_SEINTR/TDF_SERESTART thread
flags set, which is asserted in userret(). As the consequence, -1 return
from cursig() must not be possible.

Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

END