[pygtk] reducing the size of the generated code

[Rafael Espíndola]

I am now trying to reduce the code size. The first thing that I will
try to do in run pyg_boxed_check inside a loop. The final goal is to
make the generated functions similar enough to make then just call a
generic one:

__wrap__a_gtk_function(...) {
   return generic_wrap_3(..., gtk_function, ...);
}

Does someone has another idea to reduce the code size?

Best Regards,
Rafael