[capi-sig] create a new subclass data type in C

[Shaun Savage]

Hi

I can create a new object in C.  Now I am trying to create a class and
sub classes in C.  I plan to use PyType_GenericNew() to create the base
class.  
PyTypeObject myClass_Type = {
...
};

myClassObj = PyTYpe_GenericNew(myClass, ...);

How do I create something like  

class myNewClass(myClass):

in C?