D18574: Fix various OOB reads and writes in kimg_tga and kimg_xcf

[Fabian Vogt]

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

TEST PLAN
  No crash anymore.

REPOSITORY
  R287 KImageFormats

BRANCH
  sec

REVISION DETAIL
  https://phabricator.kde.org/D18574

AFFECTED FILES
  src/imageformats/tga.cpp
  src/imageformats/xcf.cpp

To: fvogt, aacid
Cc: kde-frameworks-devel, michaelh, ngraham, bruns