kernel: move "setargs" field in Proc structure after "nargs" and "args"

sys/src/9/port/portdat.h

@@ -651,6 +651,7 @@ struct Proc
 	char	*user;
 	char	*args;
 	int	nargs;		/* number of bytes of args */
+	int	setargs;	/* process changed its args */
 	Proc	*rnext;		/* next process in run queue */
 	Proc	*qnext;		/* next process on queue for a QLock */
 	QLock	*qlock;		/* addr of qlock being queued for DEBUG */
@@ -766,8 +767,6 @@ struct Proc
 	uintptr	qpc;		/* pc calling last blocking qlock */
 	QLock	*eql;		/* interruptable eqlock */
 
-	int	setargs;	/* process changed its args */
-
 	void	*ureg;		/* User registers for notes */
 	void	*dbgreg;	/* User registers for devproc */
 	Notsave;