[PATCH] lvalues abuse in lance

result of comma operator is not an lvalue

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/net/atarilance.c b/drivers/net/atarilance.c
index ad01121..e01b6a7 100644
--- a/drivers/net/atarilance.c
+++ b/drivers/net/atarilance.c
@@ -235,7 +235,7 @@
 #define	MEM		lp->mem
 #define	DREG	IO->data
 #define	AREG	IO->addr
-#define	REGA(a)	( AREG = (a), DREG )
+#define	REGA(a)	(*( AREG = (a), &DREG ))
 
 /* Definitions for packet buffer access: */
 #define PKT_BUF_SZ		1544