Copy chord noteoffsets to noteoffset expression.  Other is a const and other is not... we do not want functions possibly manipulating noteoffsets to change the static chord noteoffsets.  Also fix a similar memcpy() elsewhere.
Copy chord noteoffsets to noteoffset expression.  Other is a const
and other is not... we do not want functions possibly manipulating
noteoffsets to change the static chord noteoffsets.  Also fix a
similar memcpy() elsewhere.

turnipsi/mdl,turnipsi/mdl