Trying to fix change directory crash while entering keys in combobox.

* include/vlc/vlc.h: added a new pi_types field to vlc_list_t. This field will be used
later on by the object variables functions. I'm adding it now because it also happens to
solve a binary compatibility problem between gcc and bcc. (depending on compilers,
structs of 32 < size <= 64 bits can be returned either in a register or in the stack).

* src/libvlc.c: oops, forgot to remove a debug message.

* src/misc/objects.c: implemented the FIND_CHILD mode for vlc_list_find().
   vlc_object_get() now increments the refcount of the object so you'll need to release
the object at some point.
* src/misc/variables.c, ALL: var_Change() with VLC_VAR_GETLIST now returns a vlc_value_t
which points to a vlc_list_t.

* src/misc/threads.c: implemented vlc_thread_set_priority() for win32.

are passed (more logical).

- when eol_tok is '\n', use last line even if eol_tok isn't present

  when opening it from the playlist window, add it to the list, but
  don't change anything to the playing state and current stream.

- playlist.dfm : proper resizing behaviour

  and restore it from a file chosen by the user.

- win32/*:

  - implementation of the previous feature in the win32 interface
>   -> what the other interfaces need to do to support it is simply to
>      call the two following functions:
>       int playlist_LoadFile(playlist_t *p_playlist,const char *psz_filename);
>       int playlist_SaveFile(playlist_t *p_playlist,const char *psz_filename);
>      where psz_filename is the name of the destination/source file.

  - ability to open several files at a time

  * ./configure.ac.in: removed unpopular warnings.
  * ./po/*: updated potfiles.

   and got rid of the global variable (at last!) in the win32 interface.

Please check that navigation and language selection aren't too much
broken for DVDs...

* ALL: added a new vlc_list_t common type. vlc_list_find() and vlc_list_release() have been modified
to use this new type.

* modules/gui/wxwindows/*: added skeleton for popup contextual menu.
* modules/access/dvdplay/access.c, modules/audio_filter/resampler/linear.c: a couple of warning
fixes.

* src/input/input.c: forgot to commit this during my last commit :p

* src/input/input_clock.c, include/input_ext-intf.h: introduced an i_pts_delay field in
input_thread_t (initialised to DEFAULT_PTS_DELAY).
* modules/access/*: i_pts_delay is now configurable on an access module basis. The pts
delay for http and mms have been raised to 4 * DEFAULT_PTS_DELAY, which is about 1.2
seconds worth of caching.

    builds.

   (thanks Garf)

* modules/codec/mad/*: don't let mad drop corrupted mpeg frames without telling us. When
this happens, we miscalculate the pts of the next valid frame, which in turn causes heavy
resampling. This fix should be most useful for web radios.

The following things have still to be fixed:
- segmentation fault on destroy
- video placing and
- orientation
- video line spacing is wrong

p_input->stream.p_selected_area->i_tell when reading data. (It's done in
input_SplitBuffer). (But access should still set it on a "seek")

* modules/demux/wav/wav.c: small bug-fix for screwed pts calculation.

* src/audio_output/filters.c: fix for resampler buffer size.

* ALL: fixed a f*ckage I introduced recently ;) var_Type() now returns 0 when the variable
doesn't exist, but the rest of the code wasn't updated according to this new behaviour.
* modules/audio_output/waveout.c: changed a few error messages into warning messages.

* include/configuration.h: fixed my previous fix.

* include/configuration.h, include/modules_inner.h: proper fix for a bug that allowed gcc
to put things in the stack instead of the data segment.

one (Please reports if it doesn't).

* include/configuration.h: rolled back the last changes made to this file. There is no
sense in manually initializing all the fields of module_config_t as it will be done by the
compiler anyway. Furthermore mingw32 gcc seems to have problems optimizing code
that manually initializes structures to 0.