D12643: Don't crash if fopen fails

[Sune Vuorela]

svuorela updated this revision to Diff 33436.
svuorela added a comment.


  Fix review comments

REPOSITORY
  R223 Okular

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D12643?vs=33426&id=33436

BRANCH
  Applications/18.04

REVISION DETAIL
  https://phabricator.kde.org/D12643

AFFECTED FILES
  generators/markdown/converter.cpp

To: svuorela, aacid
Cc: #okular, ngraham, aacid
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