bugfix release

0.75 fixes a couple minor bugs (passing zero length array to java code, and returning from synchronized block)

BTW, the release name (0.75) is just the PRCS branch/version number, ie version #75 on the 0 (mainline) branch. It doesn't signify how close I think it is to a 1.0 release.

In unrelated news, I was reading about the new version of python, and one of it's new features, nested-scope! Hey, ObjectScript has had that for at least a year now! I kinda like the solution that python has for incorporating new features like nested scope, so I'll have to keep that in mind in case I ever want to introduce a new and possibly incompatible feature in ObjectScript.