Fix imperial cylinder sizes in equipment tab

[Dirk Hohndel]

On Fri, 2014-01-03 at 18:41 -0200, Thiago Macieira wrote:
> On sexta-feira, 3 de janeiro de 2014 11:37:01, Dirk Hohndel wrote:
> > So are we going to switch to C++11? I'm open to it.
> > 
> > Thiago, are you sending patches?
> 
> I need to investigate a bit more what might break. Especially on Mac, there 
> are some considerations due to the way that GCC and Clang are supported and 
> the interaction with libc++.
> 
> If we do decide to go for this, we'll need to select a minimum GCC version 
> too. Looking at supported distros for Subsurface 4.1, what would that be?

Fedora 18 
openSUSE 12 
Debian 7
Mint 15
Ubuntu 13.10 (or 13.04 - I don't really care)

MacOS 10.6

Windows XP