D19539: Replace some iterator loops by range-based for

[Albert Astals Cid]

aacid accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D19539

To: sander, #okular, aacid
Cc: aacid, davidhurka, okular-devel, joaonetto, tfella, ngraham, darcyshen