[Gpsbabel-code] Patch for CoPilot code conversion

[Paul T. <pto...@xc...>]

One of the users of my CoPilot waypoint generator pointed out that
GPSBabel doesn't handle the CoPilot files that I generate because the
CoPilot program is on version 4 of the file format but GPSBabel only
handles version 3, so I decided to do something about it.

Please find attached a patch.  I have given it a few small tests (like
using it to read a version 3 file and write a version 4 file and
converting a version 4 file to GPX) and it seems to work.

-- 
Paul Tomblin <pto...@xc...> http://blog.xcski.com/
I'm just waiting for the day that someone decides that "ignorant moron" is
an ethnic group, and thus cannot be discriminated against.
              -- Christian Wagner