D17229: Allow to build against poppler master

[Laurent Montel]

mlaurent added a reviewer: vkrause.

REPOSITORY
  R1003 KItinerary: Travel Reservation handling library

REVISION DETAIL
  https://phabricator.kde.org/D17229

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