INT 7F - Alloy MW386 - GET TASK NAME FROM PROCESS NUMBER                        
	AH = E4h
	ES:DI -> buffer for task name
---v1.x---
	AL = user number
---v2+---
	BH = user number
	BL = task number
Return: CF clear if successful
	    CL = memory size (00h=128K, 01h=256K, 02h=384K, 03h=512K, 04h=640K)
	    DX = task flags
		bit 7: MS-DOS process
	    ES:DI buffer filled
	CF set on error (invalid process number)
SeeAlso: AH=E3h,AH=E5h