possible fix for Trac Ticket #621, whereby Hauppage WinTV capture cards (PVR-150, others ?) no longer works

- commit output of MIDL compilation otherwise changes don't make it into the build

* Force the UTF-8 encoding on mp4 text subtitles. (Note they can also be UTF-16, but that needs to be converted to UTF-8 in that case. refs #612

- Code factorization

(struct should be fully initialized)

fix #616/fixes #616

    EXT is available, use pavgusb when 3DNow is available, and nothing instead.

Fix quotes arround inputs like "fake: option fake-file=thing.png" which should be "fake:" option "fake-file=thing.png"

* don't try to open real streams, but quit before triggering any errors. thanks to thedj for pointing this out.

    Please revert if this breaks something I didn't know about.
* real.c: minor clean up