Bug#650596: gnujump: game does not start

[Dean Evans]

This bug is caused by upgrading to version 1.0.6-3 of gnujump.

It looks like during the updating of the packaging for gnujump the
--datadir configure flag was incorrectly changed to point to
'--datadir=/usr/share/games/gnujump' instead of
'--datadir=/usr/share/games' as in the previous package.

The ~/.gnujump/gnujump.cfg file (correctly) does not get updated during
upgrade and default_skin variable will still point to
'/usr/share/games/gnujump/skins/default' while the data is now in 
'/usr/share/games/gnujump/gnujump/skins/default'.

Thanks,
Dean