GetNth() in a Linked List

int GetNth(struct node* head, int index)
{
    struct node* current = head;
    int count = 0; // the index of the node we're currently looking at
    while (current != NULL)
    {
        if (count == index) return(current->data);
        count++;
        current = current->next;
    }

    assert(0); // if we get to this line, the caller was asking
    // for a non-existent element so we assert fail.
}