The ugly casting is correct wrt the vlc_object_t inheritance
Signed-off-by: Rafaël Carré <funman@videolan.org>

Fix a potential segfault.

We don't want config.h stuff in vlc_common.h

This avoids having to link a few plugins with libintl on platforms where
it's not built-in libc. This also factors the internal use of
dgettext("vlc", ...).

Otherwise, the user is screwed anyway

It was an artificially-created mess. Besides, many other Windows
applications also have a data, datadir or share directory.

Some comments about the naming of the subtitles (mplayer doesn't name as gnome-subtitles does, and none of them respect the main conventions)
Most of the subtitles format are now parsed. However, some styles are still discarded.

(well, you _can_ but you'd need to use uselocale() then)

(we don't want sample scripts to break in certain countries)

(and at least the Qt interface uses commas for preferences formatting)

as it does not work anymore

This is a cosmetic change at this point as _() invokes dgettext(). This
is just a small step toward supporting out-of-tree plugins. These will
need to use their own text domain.

Fix #1590 - patch by jj