[NET]: Micro optimization in eth_header()

Signed-off-by: Denis Vlasenko <vda@ilport.com.ua>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 6617ea4..ab60ea6 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -92,10 +92,9 @@
 	 *	Set the source hardware address. 
 	 */
 	 
-	if(saddr)
-		memcpy(eth->h_source,saddr,dev->addr_len);
-	else
-		memcpy(eth->h_source,dev->dev_addr,dev->addr_len);
+	if(!saddr)
+		saddr = dev->dev_addr;
+	memcpy(eth->h_source,saddr,dev->addr_len);
 
 	/*
 	 *	Anyway, the loopback-device should never use this function...