don't try to emit onScroller events when autosizing during rendering
don't try to emit onScroller events when autosizing during rendering

Fixes assertion failure in swfdec_player_lock()

freedesktop-unofficial-mirror/swfdec__swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec