D20547: KCalCore: Fix some compiler warnings

[Allen Winter]

winterz created this revision.
winterz added a reviewer: vkrause.
Herald added a project: KDE PIM.
Herald added a subscriber: kde-pim.
winterz requested review of this revision.

REVISION SUMMARY
  deal with return values and remove some unused variables

TEST PLAN
  make && make test still work

REPOSITORY
  R172 KCalendar Core

REVISION DETAIL
  https://phabricator.kde.org/D20547

AFFECTED FILES
  autotests/loadcalendar.cpp
  autotests/testattendee.cpp
  autotests/testcreateddatecompat.cpp
  autotests/testfreebusy.cpp
  autotests/testicalformat.cpp
  autotests/testoccurrenceiterator.cpp
  src/memorycalendar.cpp

To: winterz, vkrause
Cc: kde-pim, dvasin, rodsevich, winterz, vkrause, mlaurent, knauss, dvratil
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