Title is found in input instead of playlist (fix a small vlm bug...).

- changed dshow plugin to use common IID defined in libuuid.a (prevents linking problems if plugin is built-in)

* modules/gui/wxwindows/playlist.cpp: sanity check to avoid crashes (doesn't explain why the check is triggered though).

* src/misc/modules.c, modules/access/directory.c: Win32 fixes (GetFileAttributes() returns -1 on error).

size constrain fixes

 * mosaic.c : add a switch to keep aspect ratio when resizing

 * picture.c picture.h : vout that copies the rendered image in a libvlc
                         object.
 * mosaic.c : sub filter that takes all the images created by the picture
              module and blends them over the current video

I think i still have loads of things to fix (like memleaks)

Simple vlm configuration file to see this work :
<<<<
new chan1 broadcast enabled
setup chan1 input somevideo1.avi
setup chan1 option vout=picture

new chan2 broadcast enabled
setup chan2 input somevideo2.avi
setup chan2 option vout=picture

new bg broadcast enabled
setup bg input somevideo0.avi
setup bg option sub-filter=mosaic

control bg play
control chan1 play
control chan2 play
>>>>

You just have to launch : ./vlc -I telnet --vlm-conf vlm.conf

* src/extras/dirent.c, ALL: fixed win32/ce dirent replacement and made it accessible from plugins as well.

correct output resolution on the created windows

 auto eof when no more data received in 3s (not tested a lot, so please report
 any problem).
  Do not set dts for video stream (make libmpeg2 happy).
 

    - BLOCK_FLAG_CORRUPTED : signal corrupted data (do not use anymore
 BLOCK_FLAG_DISCONTINUITY in that case)
    - BLOCK_FLAG_PREROLL : mark this block to be decoded (no matter what).
 * ffmpeg, libmpeg2: support BLOCK_FLAG_PREROLL (ie disable frame dropping).
 * input: added ES_OUT_SET_NEXT_DISPLAY_TIME to ease the work for preroll
 (untested).
 * mp4: added support for CTTS table (pts, needed for h264+bframe).
 * decoders: for now handle discontinuity and corrupted block the same way.

* src/misc/httpd.c,  modules/demux/subtitle.c, modules/gui/wince/wince_rc.rc: more WinCE build fixes.

* modules/video_output/wingdi.c: major optimizations (avoid unnecessary memcpy of video frames + direct rendering for gapi).

fullscreen. Collect the "blackness" on the far left/right/top/bottom.
todo:
* Make window aspect-ratio configureable
* handle anamorphic input
* constain the sizes of the windows to legal values
* handle some rounding errors