Bug#640789: Same patch applies for more bugs

[Chris Tillman <toff.tillman@gmail.com>]

The patch is a simple fix, and should be applied with urgency. It will also fix some other bugs

628991@bugs.debian.org
https://bugs.launchpad.net/ubuntu/+source/iso-scan/+bug/838720

Frans Pop seems to have noticed this in bug 440301 and thought he fixed it in 2007:

--
P.S. It does look like there is a minor bug in isoscan (which should not
affect this case though). The first call in line 111 uses quotes, the
second one in line 166 does not; I think this will make the comparison in
line 167 always false (if there are multiple DEVS). I've fixed that.
--

So, here it is 7 years later. How can this bug still exist?

--
Chris Tillman