gpgme.go
func gogpgme_assuan_data_callback(handle unsafe.Pointer, data unsafe.Pointer, datalen C.size_t) C.gpgme_error_t {
	c := callbackLookup(uintptr(handle)).(*AssuanDataCallback)
	if *c == nil {
		return 0
	}
	(*c)(C.GoBytes(data, C.int(datalen)))
	return 0
}
func gogpgme_assuan_data_callback(handle unsafe.Pointer, data unsafe.Pointer, datalen C.size_t) C.gpgme_error_t {
	c := callbackLookup(uintptr(handle)).(*AssuanDataCallback)
	if *c == nil {
		return 0
	}
	(*c)(C.GoBytes(data, C.int(datalen)))
	return 0
}
//export gogpgme_assuan_data_callback