Fix "Current fanart" not being shown in DialogVideoInfo.

I'm not sure why and I didn't investigate further, but a combination of early
unpacking the fanart and accessing the CFileItemPtr in place of the CFileItem
fixes the issue.

(cherry picked from commit 7f1a748935cbd95f638ba03e4d819d3567d71068)
[repo] change repo URLs to use mirrors.kodi.tv
Merge pull request #5787 from MartijnKaijser/repo

[repo] change repo URLs to use mirrors.kodi.tv
Merge pull request #5713 from anaconda/fix-curfanart

Fix "Current fanart" not being shown in DialogVideoInfo.
dvdplayer: observe pts counter overflow
vdpau: advanced settings for auto deinterlacing
ActiveAE: slightly reduce buffer size
ActiveAE: add some debug logging
pthreads: use mutex protocol PTHREAD_PRIO_INHERIT
vaapi: lock gfx context on pre-cleanup
Bump xbmc-pvr-addons ref