allow null values for dataengines as sugested by aseigo.
BUG:237760 svn path=/trunk/KDE/kdelibs/; revision=1128225
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@ -47,7 +47,7 @@ const DataEngine::Data DataContainer::data() const
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void DataContainer::setData(const QString &key, const QVariant &value)
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{
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if (value.isNull() || !value.isValid()) {
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if (!value.isValid()) {
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d->data.remove(key);
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} else {
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d->data[key] = value;
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