contribs: fix libdvdnav runtime on win32 (patch was deleted when switching to mplayer's libdvdnav), extract using gzip

* withCString is deprecated in 10.4. Use WithUTF8String instead, as VLC's core is completely UTF8 now. Remove a couple of (nowadays) useless checks

Qt4 - simplify the VideoWidget. VideoWidget is a just an simple QFrame with the necessary interactions...

services_discovery/sap.c: Make sure the thread will exit, even if in poll(). And properly lock the object.

include/vlc_objects.h: Use the usual macro trick, to publish a function that take as argument a vlc_object_t *, here for vlc_object_waitpipe().

(it does not find any error here)

 - Fix comments
 - Cache pagesize

Qt4 - Use a main instance of Sout for VLM. Clean DP since all dialogs (except Bookmarks that won't be done...) are done.