Lumix: copying files (zero size)

[willat8]

The lumix libgphoto2 camlib is only partially implemented and complicated by the HTTP camera protocol.

With out-of-the-box gphotofs directory listing works but copying off files doesn't. I think this is because internally get_info_func is not implemented so the files default to zero size.

I have made a tweak here in gphotofs_getattr to grab the correct file size from the hash table if it exists. This gets copying working for me but I'm not very familiar with FUSE or libgphoto so I doubt this is a good solution.

I also had to rewind back to before c62319b since that commit broke mounting due to the partial lumix implementation.

I've put all this into a PPA for anyone else who needs this https://launchpad.net/~willat8/+archive/ubuntu/gphoto.

(Relates to this discussion gphoto/libgphoto2#409)