use seek_step var to judge if it is continuous when detect_silence

[karlzheng]

Signed-off-by: KarlZheng zhengkarl@gmail.com

[karlzheng]

build error seems because : http://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-latest-win64-shared.7z is moved.

[jiaaro]

I've fixed the appveyor test config, please pull from master :)

Also, could you please explain a bit about what this change is intended to do? If it is a bug fix, could you please add a unit test which fails without this change?

[karlzheng]

it is logically, when call:
def split_on_silence(audio_segment, min_silence_len=1000, silence_thresh=-16, keep_silence=100, seek_step=100),

whether the chunk is continue is determined by seek_step, not by 1:)