Removed a redundant parameter from stream helper priv_update_sending()
Removed a redundant parameter from stream helper priv_update_sending()

The pending_send_flags parameter was always taken from the stream state.
Now that we use another bit of stream state inside the helper, there's not
even an aesthetical point.

freedesktop-unofficial-mirror/telepathy__telepathy-rakia,freedesktop-unofficial-mirror/telepathy__telepathy-rakia,freedesktop-unofficial-mirror/telepathy__telepathy-rakia