Inserts a node into a list before another node already in the list.
void InsertNodeBefore(Node *oldNode, Node *newNode);
This function lets you insert a new node into a list, BEFORE another node that is already in the list.
Convenience call implemented in clib.lib V24.
A node can be included only in one list.
GIGO (garbage in, garbage out)
AddHead
(), AddTail(), InsertNodeFromHead(), InsertNodeFromTail(), RemHead(), RemNode(), RemTail(), InsertNodeAfter()