Check exists before listing dir, to avoid produce error log, fix #14210
[FFmpeg] version bump to n1.2 (rev e820e3a) - lib/ffmpeg

This commit now contains the original patches sub directory:
  patches 			- Org dir that contains applied xbmc custom patches.
  patches/README-patches	- New README file with info about xbmc patches.
  patches/obsolete-patches	- New dir with obsolete xbmc patches.
[FFmpeg] version bump to n1.2 (rev e820e3a) - xbmc files

lib/DllAvFormat.h
lib/Makefile.in
lib/ffmpeg/build_xbmc_win32.sh
project/Win32BuildSetup/BuildSetup.bat
project/Win32BuildSetup/buildmingwlibs.sh
tools/depends/native/gas-preprocessor-native/gas-preprocessor.pl
xbmc/DllPaths_win32.h
xbmc/cores/dvdplayer/DVDAudio.h
xbmc/cores/dvdplayer/DVDCodecs/DVDCodecs.h
xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecFFmpeg.cpp
xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecFFmpeg.h
xbmc/cores/dvdplayer/DVDCodecs/Video/DVDVideoCodecLibMpeg2.cpp
xbmc/cores/dvdplayer/DVDCodecs/Video/DXVA.cpp
xbmc/cores/dvdplayer/DVDDemuxers/DVDDemux.h
xbmc/cores/dvdplayer/DVDPlayerAudio.h
xbmc/cores/dvdplayer/DVDStreamInfo.h
changed: Cosmetics
fixed: We should only try to extract/show thumbs/flags for file-like items (fixes #14176)
fixed: The check for determining whether we're done was wrong
fixed: Auto flags didn't work for items without a VideoInfoTag
changed: Improve logic in GetStreamDetails() for items without a (complete) VideoInfoTag
fixed: Setting streamdetails for auto thumbs/flags didn't work for items with incomplete/empty infotags
fixed: Make sure item has a VideoInfoTag before accessing it
upnp: missing playlist & musicvideo nodes for music library
upnp: smartplaylists had incorrect upnp:class
upnp: fixed missing fanart and thumbs for playlist items. fixes #13945
Add isvideo info for slideshow window.
[musicdb] cosmetic: remove CSongMap and just use an std::map instead
[musicdb] cosmetic: make the path / filename index unique
[rpi] fix commit after 0e15d214b4264510e629112554194b74067d84d9
Merge pull request #2565 from ulion/add_slideshow_isvideo_info

Add isvideo info for slideshow window.
videodb: use strings instead of numbers in videodb:// URL
CUPnPServer: fix bad videodb:// URL