[PATCH] pktgen: remove useless assignment

From: Alexey Dobriyan <adobriyan@gmail.com>

On main codepath pkt_dev is immediately rewritten. On error codepath it isn't
used.

Noticed by Coverity checker.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

Index: linux-kj/net/core/pktgen.c
===================================================================
--- linux-kj.orig/net/core/pktgen.c	2005-12-05 13:17:38.000000000 +0300
+++ linux-kj/net/core/pktgen.c	2005-12-05 13:20:05.000000000 +0300
@@ -2828,8 +2828,7 @@ static int pktgen_add_device(struct pktg
 	
 	/* We don't allow a device to be on several threads */
 
-	pkt_dev = __pktgen_NN_threads(ifname, FIND);
-	if (pkt_dev) {
+	if (__pktgen_NN_threads(ifname, FIND)) {
                 printk("pktgen: ERROR: interface already used.\n");
                 return -EBUSY;
         }