[PATCH] sk_g16 missing declaration

The new probe code in net-drivers-2.5-exp lost a declaration for the
module case (thanks al).

diff -Nru a/drivers/net/sk_g16.c b/drivers/net/sk_g16.c

--- a/drivers/net/sk_g16.c	Tue Nov 11 09:36:10 2003
+++ b/drivers/net/sk_g16.c	Tue Nov 11 09:36:10 2003

@@ -604,6 +604,9 @@
 
 
 #ifdef MODULE
+
+static struct net_device *SK_dev;
+
 static int __init SK_init_module (void)
 {
  	SK_dev = SK_init(-1);