wavpack core dumps doing md5

[Graham Stephens]

I don't know if this is machine-specific as I only have the one sparc 
machine on OpenBSD at the moment (blade 100).
When running wavpack with the -m option (for md5 calculation), I get a 
core dump with a message of 'Bus Error'.
It works ok for other options, and of course the standard md5 works ok 
as well.

OBSD v6.1 with wavpack v5.1.0