D21967: Fix warning when reading plugin metadata

[Nicolas Fella]

nicolasfella added a comment.


  It is the only place I found where KPluginMetaData.value is called on a list

REPOSITORY
  R495 Purpose Library

REVISION DETAIL
  https://phabricator.kde.org/D21967

To: nicolasfella, apol, aacid
Cc: kde-frameworks-devel, LeGast00n, michaelh, ngraham, bruns
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