Fix Array.sort with RETURNINDEXEDARRAY when some values were set to undefined
Fix Array.sort with RETURNINDEXEDARRAY when some values were set to undefined

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