Release a an Intuition lock gotten by LockIBase().
Source position: intuition.pas line 3257
| procedure UnlockIBase( | 
| LockNumber: LongWord | 
| ); | 
| LockNumber | 
 | The value returned by LockIBase() should be passed to this function, to specify which internal lock is to be freed. | 
Calling this function when you do not own the specified lock will immediately crash the system.
| 
 | Invoke semaphore arbitration of TIntuitionBase. |