COR.MAC/-BF=COR.VGN
-3,3,/;DAD001/
\
	.IDENT	/V2.1/
-31,,/;DAD001/
;	DAD001		D. A. DeMott	5/9/83
;			Correct handling of NULL task TCB to avoid system
;			crash.
%
-337,337,/;DAD001/
	TST	T.TCBL(R0)		;;;null task TCB?
	BNE	2$			;;;branch if not
/