[Libvir] python/libvir.c returning wrong value on error?

Hi all, Looking at python/libvir.c, all the custom functions return VIR_PY_NONE on error. This unfortunately doesn't map well to some of the generated python bindings which expect an error val of -1. So if these commands fail, no exception will be thrown at the python level. (Ex. virDomainGetAutostart, virDomainGetVcpus and their python equiv.) I'm wondering where the fix should be: in python/libvir.c, changing these error return values, or in the generator somewhere? Thanks, Cole