Make sure we have the plugin before checking for features it provides.
Make sure we have the plugin before checking for
features it provides.

svn path=/trunk/kdesupport/qca/; revision=703516

highfidelity/qca,Esf-Software/qca,oktavarium/qca,karolherbst/qca,KDE/qca,karolherbst/qca,sladage/qca,karolherbst/qca,JoshuaKolden/qca,JoshuaKolden/qca,JoshuaKolden/qca,Bjoe/qca,KDE/qca,sladage/qca,highfidelity/qca,Bjoe/qca,oktavarium/qca,Bjoe/qca,KDE/qca,Esf-Software/qca,oktavarium/qca,sladage/qca,highfidelity/qca,highfidelity/qca,sladage/qca,JoshuaKolden/qca,Esf-Software/qca,KDE/qca,oktavarium/qca,Esf-Software/qca,Bjoe/qca,karolherbst/qca