Prevent LZ encoder from hanging with known uncompressed size. The "fix" breaks LZMA_SYNC_FLUSH at end of stream with known uncompressed size, but since it currently seems likely that support for encoding with known uncompressed size will go away anyway, I'm not fixing this problem now.
Prevent LZ encoder from hanging with known uncompressed
size. The "fix" breaks LZMA_SYNC_FLUSH at end of stream
with known uncompressed size, but since it currently seems
likely that support for encoding with known uncompressed
size will go away anyway, I'm not fixing this problem now.

pombreda/go-liblzma,pombreda/go-liblzma,pombreda/go-liblzma