Function is_valid

c/tests/tls_test.cpp:273–275

}

bool is_valid(pn_raw_buffer_t &rb) {
  return rb.bytes && rb.capacity && (rb.size + rb.offset <= rb.capacity);
}

void drain_processed_input_bufs(pn_tls_t *tls) {
  pn_raw_buffer_t rb;