Two small change suggestions

[mhewett-ks]

Sorry - running short of time. Next time I'll try to generate a pull request.

1. Allow generating a Java library on MacOS:

   
   $ git diff version3/java/config64.py 
   --- a/version3/java/config64.py
   +++ b/version3/java/config64.py
   @@ -9,7 +9,7 @@ org1text="org"
   org2text="apache"
   org3text="milagro"

-if sys.platform.startswith("linux") : +if (sys.platform.startswith("linux") or sys.platform.startswith("darwin")) : copytext="cp " deltext="rm " slashtext="/"

2. version3/java/DBIG32 and version3/java/DBIG64 have a syntax error around line 235: cast_to_chunk() is in the BIG class.  This should be caught by your test platform...

    int i,wd,bt;
    wd=m/CONFIG_BIG.BASEBITS;
    bt=m%CONFIG_BIG.BASEBITS;

• w[wd]&=((cast_to_chunk(1)<<bt)-1);
• w[wd]&=((BIG.cast_to_chunk(1)<<bt)-1); for (i=wd+1;i<BIG.DNLEN;i++) w[i]=0;

[mcarrickscott]

point 2. was fixed already.

point 1. is a good idea..