D18950: KCompressionDevice: reset error in open() to allow reuse of object

[Matthias Gerstner]

mgerstner created this revision.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
mgerstner requested review of this revision.

REVISION SUMMARY
  Previously is was not possible to reuse a `KCompressionDevice` object
  after a call to `open()` failed and `propagateErrorCode()` was called. A
  subsequent `open()` would work but a later `close()` will fail, because
  the older errorCode is still set.
  
  By resetting the error code before doing an `open()` this situation is
  avoided and reuse of objects becomes possible.

REPOSITORY
  R243 KArchive

REVISION DETAIL
  https://phabricator.kde.org/D18950

AFFECTED FILES
  src/kcompressiondevice.cpp

To: mgerstner
Cc: kde-frameworks-devel, michaelh, ngraham, bruns
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