D20488: Fix build with poppler <0.58

[Heiko Becker]

heikobecker created this revision.
Herald added a project: Okular.
Herald added a subscriber: okular-devel.
heikobecker requested review of this revision.

REVISION SUMMARY
  - Poppler::FormFieldSignature::signatureType
  - Poppler::SignatureValidationInfo::hashAlgorithm
  - Poppler::SignatureValidationInfo::signature
  - Poppler::SignatureValidationInfo::signedRangeBounds
  - Poppler::SignatureValidationInfo::signerSubjectDN
  - Poppler::SignatureValidationInfo::signsTotalDocument
  
  were all introduced with poppler 0.58.

TEST PLAN
  Builds fine with poppler 0.57 and 0.75, looked at
  http://tecxoft.com/samples/pdf_digital_signature_timestamp.pdf

REPOSITORY
  R223 Okular

BRANCH
  fix-build-with-poppler-0.58

REVISION DETAIL
  https://phabricator.kde.org/D20488

AFFECTED FILES
  generators/poppler/CMakeLists.txt
  generators/poppler/config-okular-poppler.h.cmake
  generators/poppler/formfields.cpp
  generators/poppler/pdfsignatureutils.cpp

To: heikobecker
Cc: okular-devel, joaonetto, tfella, ngraham, darcyshen, aacid
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