Actually initialize PendingStreamedMediaStreams::streamsReady
Actually initialize PendingStreamedMediaStreams::streamsReady

Otherwise the pending op won't reliably finish!

The test suite was showing it not being initialized and hence the PendingStreamedMediaStreams never
finishing occasionally (when the memory location in question didn't happen to be 0 already by
accident).

special/telepathy-qt-upstream,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,special/telepathy-qt-upstream,detrout/telepathy-qt,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,anantkamath/telepathy-qt,TelepathyQt/telepathy-qt,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,detrout/telepathy-qt,detrout/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyIM/telepathy-qt,TelepathyIM/telepathy-qt,anantkamath/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,tiagosh/telepathy-qt,tiagosh/telepathy-qt,special/telepathy-qt-upstream,tiagosh/telepathy-qt,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyQt/telepathy-qt,anantkamath/telepathy-qt