Fix hang on startup by not syncing on Boolean.
Caused by 46da52f3b9332a9676b8800aacf897f1647a2c2d
Fixed by a7325792ce4bf0ac8300a010ec79bddc04475100
Reinstated by aadbe648c8048f5e4717f3ceafab910fee313ce5
Merge branch 'master' of github.com:Metaswitch/libjitsi