misc/172978: dump: mark non-returning function quit() as such in function prototype

[eadler at FreeBSD.org]

Synopsis: dump: mark non-returning function quit() as such in function prototype

Responsible-Changed-From-To: freebsd-bugs->eadler
Responsible-Changed-By: eadler
Responsible-Changed-When: Tue Oct 23 15:41:52 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=172978