ports/165938: sysutils/dvdisaster: Fix segfault/drive detection failure on 9.x

[crees at FreeBSD.org]

Synopsis: sysutils/dvdisaster: Fix segfault/drive detection failure on 9.x

Responsible-Changed-From-To: freebsd-ports-bugs->crees
Responsible-Changed-By: crees
Responsible-Changed-When: Wed Mar 14 18:45:41 UTC 2012
Responsible-Changed-Why: 
I'll take it.  By the way, please don't put whitespace fixes into a
patchfile for a port!

http://www.freebsd.org/cgi/query-pr.cgi?pr=165938