D5983: Check error status after every PolKitAuthority usage

[Sergey Kalinichev]

skalinichev added inline comments.

INLINE COMMENTS

> aacid wrote in Polkit1Backend.cpp:220
> This seems a bit weird since we have done nothing with authority here, so how would it have an error?

Well yes it shouldn't happen now with the two other checks above. This check here just in case (that's why I use qWarning here instead of qCDebug as in two other cases).

Also since PolkitAuthoruty is a singleton theoretically some other code using PolkitQt1::Authority methods could trigger such errors.

REPOSITORY
  R283 KAuth

REVISION DETAIL
  https://phabricator.kde.org/D5983

To: skalinichev
Cc: aacid, #frameworks
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