calls to realloc(_,0) in a similar way to input_programs.c.

Another fix from Sam:

* fix random segfaults on title change.
  (cell.i_cell_nb should be tested _before_ we access the structures)

* src/input/input_programs.c: fixed memory corruption by setting a few
    pointers to NULL after they have been free()ed.
* src/input/input_programs.c: removed now useless ASSERTs.

This patch comes from sam, so if you want to blame someone blame him ;-)

Lower CPU usage and no thread created per frame.

                     of its own one.

    audio track" problems by zeroing the p_ac3dec structure.
  * ./plugins/ac3_adec/ac3_adec.c: fixed a "INPUT_MAX_ALLOCATION reached"
    crash.

 * plugins/win32/network.*: new Network dialog box

when closing a  networking stream instead of input_FDClose().  It is due
to WIN32  because we have  to call  closesocket() instead of  close() to
close the socket. The problem was  : windows did not leave the multicast
group when closing the socket.

  * input_ext-plugins.c : where is located the function
  * *.h : function declaration
  * udp.c, http.c : these modules now call input_FDNetworkClose()

  of the network_ChannelJoin() for WIN32.

  It closes the following bug : when changing channel we sometimes got
  a 'no answer from vlcs' even if the answer is sent back.

    modules where option arguments and playlist entries were mixed.

    should be OK now.

    which should fix crashes after a long pause.

                                to a PMT.

* new --with-mad-tree configure option.
* updated BUGS file.

    try to use it, unless it was explicitely requested (--vout for example).

  * include/common.h, src/misc/modules_plugin.h: export the 3 new functions.
  * plugins/dvd/dvd_es.c, plugins/dvd/dvd_summary.c, plugins/dvdread/input_dvdread.c: adapted DecodeLanguage calls to the new behaviour.
  * plugins/mpeg_system/mpeg_ts.c: ISO-639-2 descriptors handling.

   of Yves Duret and other Mandrakesoft guys I don't know.

                               Meuuh.

only the first 4 bytes for mpeg header so some broken files, and all
web radio will not work. You can change this by changing value
of MPEGAUDIO_MAXTESTPOS.

                          with other documentations (thank you Alexis)
    * plugins/satellite/*: some fixes in options parsing (thank you Sam)

* Mac OS X fix.

play PS stream (I hope it will be enougth). Sorry .

    * ALL : version from ffmpeg cvs can now decode msmpeg4 v1 v2 ,
        so i have added support for this. But you can always use old ffmpeg
        library  without any problem ( i hope ;)