Hans-Christoph Steiner cbc0c39ec2 make sure cached file exists before trying to find it in the db
Files in the cache can be deleted at any time, without warning.  F-Droid's
CleanCacheService can do it, the user can do it in Settings --> Apps, etc.
So when working with files from the cache, the methods need to be extra
defensive, checking that the file that they were given still exists.

closes #1305
2018-02-02 09:59:11 +01:00
..
2017-12-01 21:34:45 +01:00
2017-05-31 17:29:40 +02:00