D10166: Add -Wlogical-op -Wzero-as-null-pointer-constant to KF5 warnings

[Albert Astals Cid]

aacid planned changes to this revision.

REPOSITORY
  R240 Extra CMake Modules

REVISION DETAIL
  https://phabricator.kde.org/D10166

To: aacid
Cc: cgiboudeaux, dhaumann, #frameworks, #build_system, michaelh