LZMA SDK 19.00 Note

Files Threads.c ../include/Threads.h
are from p7zip SDK 16.02 for POSIX compatibility reasons.

File ../include/MtCoder.h contains an addition for SDK
19.00 compatibility.
#define MTCODER__USE_WRITE_THREAD // need for lrzip

File ../include/Threads.h contains an addition for SDK
19.00 compatibility.
#define Semaphore_IsCreated(p) ((CSemaphore *) (p) != NULL) // need for lrzip

