vf_frei0r: fix missing end of line character

Error introduced in 61b323ce7c7cdc101eadfd7de2203922b8a39e8d.
avienc: K&R formatting cosmetics

Signed-off-by: Diego Biurrun <diego@biurrun.de>
vda: Use the current hwaccel1 layout

Breaks compatibility on purpose the hardest way.
vda_h264: Use av_buffer to manage buffers

Fix a buffer leak when seeking occurs.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>