failed to set signal flags properly for ast()

[Poul-Henning Kamp]

On a -current kernel from this morning, I ran a "make -j 12 -s buildworld".

At some point I pressed ctrl-Z and it started spitting tons of
	failed to set signal flags properly for ast()
out on the serial console, but after about a minute it stopped and the system
continued.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.