cc_queue_new_conf calls cc_deque_new_conf with &deque as parameter.

However, in case of allocation error, cc_deque_new_conf may return early without executing the *d = deque statement at the end of the function, leaving the input parameter uninitialised.

Then, deque is checked in cc_queue_new_conf, but if allocation failed, it is not NULL, it is just uninitialised, leading to undefined behaviour.