Modified _get_args in _callback
Modified _get_args in _callback

The new version looks more like C logic and might work better for the jit.

babelsberg/babelsberg-r,babelsberg/babelsberg-r,babelsberg/babelsberg-r,babelsberg/babelsberg-r,topazproject/topaz,babelsberg/babelsberg-r,topazproject/topaz,topazproject/topaz,topazproject/topaz