[odb-users] reuse inheritance with templated base class

[Boris Kolpackov]

Hi Marcel,

Ok, I've fixed it so the explicit template instantiation is no longer
necessary. I replaced the 2.4.0.a3 Windows binary with the fixed one
so that you don't need to rebuild the runtimes:

http://codesynthesis.com/~boris/tmp/odb/pre-release/odb-2.4.0.a3-i686-windows.zip

Let me know if there are any other issues.

Boris