salut_tube_stream_set_property: dup the boxed and destroy the old one if needed
salut_tube_stream_set_property: dup the boxed and destroy the old one if needed

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut