Get the needed variable definitions.

def c_var_decls(self):
        """Get the needed variable definitions."""
        if self.opts.no_structs:
            mod_decl = 'HMODULE {} = NULL;\n'.format(self.name)
            return [mod_decl] + [
                '{} *{} = NULL;\n'.format(
                    self._c_type_name(name), name
                )
                for name, dummy_args in self.funcs
            ]
        if self.opts.windll:
            return ''
        return [
            '{} _{} = {{ 0 }};\n'.format(
                self._c_struct_names()[1], self.name
            )
        ]