[downloader/fragment] Remove assert for resume_len when no fragments downloaded

This may be incorrect due some header (e.g. flv header in f4m downloader)
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Sergey M․ 2017-04-28 03:24:59 +07:00
parent 8814ae42bc
commit c0fa4245ce
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@ -155,8 +155,6 @@ class FragmentFD(FileDownloader):
self._write_ytdl_file(ctx)
if ctx['fragment_index'] > 0:
assert resume_len > 0
else:
assert resume_len == 0
dest_stream, tmpfilename = sanitize_open(tmpfilename, open_mode)