D29140: Fix POTD in lock screen (partly)

[Yunhe Guo]

guoyunhe created this revision.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
guoyunhe requested review of this revision.

REVISION SUMMARY
  POTD was cached in `~/.cache/`. But lock screen seems not a process of current user, so it won't find the cache in user's home dir. So I changed cache location to `/tmp` and it starts to work. Note: it only works when your lock screen use the same POTD provider as your desktop wallpaper.

REPOSITORY
  R114 Plasma Addons

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D29140

AFFECTED FILES
  dataengines/potd/cachedprovider.cpp

To: guoyunhe
Cc: plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, ragreen, ZrenBot, ngraham, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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