PZlib (Alternative to Precomp)

[chum]

Hey bro, you said to use -v for CRC problems, but using -v just blocked any compressing gains, the compressed file just become out same size of input file. Without -v decompressing is just failing with CRC Always.

I like Pzlib for compresisng since it is much faster than Precomp and give nearly same final size but decompressing problem is just avoiding to it be a standard usage for me.

If you just remove the multithreading for decompressing dont it fix the problem since decompressing is known to work properly in single-thread..