:</strong><br />
The next MovableObject in this Actor's inventory. Ownership IS xferred!<br />
If there are no MovableObject:s in inventory, 0 will be returned.<br />
</p><br/><h3>Function:</h3><h2>SwapPrevInventory</h2><p>
Swaps the prev MovableObject carried by this Actor and puts one not currently carried into the into the back of the inventory of this.</p><p><strong>Arguments:</strong><br />
A pointer to the external MovableObject to trade in. Ownership IS xferred!<br />
If 0 is passed in, nothing will 