Fix a problem with callback proxies with zero or one parameters.
from pybindgen import Module, FileCodeSink, write_preamble, param, retval
def register_types(module):
module.add_class('MyClass')
def register_methods(root_module):
MyClass = root_module['MyClass']
MyClass.add_constructor([], visibility='public')
MyClass.add_constructor([param('double', 's'), param('double', 'l'), param('double', 'mean')], visibility='public')
def register_functions(module):
module.add_function('SomeFunction', 'int', [param('int', 'xpto')])