D25033: Extract images from excel files which omit the FtCF entry.

[Andrew den Exter]

denexter created this revision.
denexter added a reviewer: pvuorela.
Herald added a project: Calligra: 3.0.
Herald added a subscriber: Calligra-Devel-list.
denexter requested review of this revision.

REVISION SUMMARY
  The specification says it and the flags entry must exist if the object type is picture but appears to not be true of some files. Since there's no essential information there add a basic check for the field id and if it not what is expected skip parsing of that field without invalidating the entire object.

REPOSITORY
  R8 Calligra

REVISION DETAIL
  https://phabricator.kde.org/D25033

AFFECTED FILES
  filters/sheets/excel/sidewinder/excel.cpp

To: denexter, pvuorela
Cc: Calligra-Devel-list, dcaliste, cochise, vandenoever
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