Fix deadlock, QWaitCondition::wait() locks the mutex again when returning.
Fix deadlock, QWaitCondition::wait() locks the mutex again when
returning.

svn path=/trunk/KDE/kdepim/akonadi/server/; revision=681064

kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi