Simply ignore duplicate literal values on the same resource.
author Sebastian Trueg
()
committer Sebastian Trueg
()
commit 03d1a67d2f6ac04ae82af2abcd0c6acd7ab1c82e
tree e705806ad43ad879bbf3d6a675288b57f44663ee
parent 1cefd5d9162ad88fc4862a34c981b8ac388db0b7
Simply ignore duplicate literal values on the same resource.

There were a lot of errors which claimed that the cardinality of a
property was surpassed by duplicate values. Using a QSet here avoids
that.
services/storage/resourcemerger.cpp