[pvr] fix playback of recordings when an exact duplicate exists.

[Jalle19]

This happens if one for some reason records a show twice, stopping
in between (which creates two separate recordings).

@ksooo should we backport this? The issue is relatively rare but it inevitable prevents playback of any duplicate recordings.

[Jalle19]

jenkins build this please

[Jalle19]

Fixes kodi-pvr/pvr.hts#69 and http://forum.kodi.tv/showthread.php?tid=232815 by the way

[ksooo]

This one bugged me for a long time. Thx for the fix.
Obviously a nobrainer. So, code change looks good.
I think it's worth backporting.

[Jalle19]

Per my comment in #8220, do we want to revert this since it breaks all resume points/watched statuses for existing recordings (since the file item path has changed)?

[ksooo]

I suggest to revert and to come up with a proper fix.

[Jalle19]

This is a proper fix but we need to somehow migrate the "bookmarks" to use the new path. I'm fine with reverting for now though.

[MartijnKaijser]

I want to release 15.2 tomorrow. Make reverting doesn't make it worse

[Jalle19]

@MartijnKaijser we're discussing reverting in master, Isengard was never touched so go ahead and make a release if you'd like.