doc/outdevs/sdl: fix confusing text about window_fullscreen default value
lavd/sdl: do not manually free window_title and icon_title fields

They are automatically freed when calling av_write_trailer(). Simplify.
avformat/asfdec: remove duplicated packet_segments reset

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/asfdec: reset packet_time_start when asf_read_frame_header() failed

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/asfdec: ignore packet_segments

Fixes Ticket1708
Based on patch by Alberto Delmás

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>