lavfi/edgedetect: add direct path.
lavfi/edgedetect: reindent after previous commit.
h264pred: fix "warning: initialization discards const qualifier from pointer target type"

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
flvdec: fix seeking in audio only files

Fixes Seeking with the file in Ticket2283

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