INT 2C P - Cloaking v1.01 - UNREGISTER CLOAKING CLIENT                          
	AX = 0034h
	DS:EDX -> client registration structure (see #02567)
Return: CF clear if successful
	CF set on error (linked list corrupt)
Note:	the client must unregister before freeing the XMSsee Extended Memory Specification block containing
	  its registration structure(s)
SeeAlso: AX=0033h,#02778 at INT 2F/AX=4310h"Cloaking"