Add checks for tag 0xF014(Clip Action)

1.In wii version, `key_code` is missing, while in pspdx version, it
exists.But i don't see it being used.
2.The name `clip_event_flags` is from swf spec v10, where several clip
actions
are packed together. But in lm files, we can have several clip action
tags follow a place object2 tag in a row.So, i doubt its name should be
`clip_event_flag`