route: Mark unused route cache flags as such.

Also removes an obsolete check for the unused flag RTCF_MASQ.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index df41026..96be336 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1792,7 +1792,7 @@
 	if (err)
 		flags |= RTCF_DIRECTSRC;
 
-	if (out_dev == in_dev && err && !(flags & RTCF_MASQ) &&
+	if (out_dev == in_dev && err &&
 	    (IN_DEV_SHARED_MEDIA(out_dev) ||
 	     inet_addr_onlink(out_dev, saddr, FIB_RES_GW(*res))))
 		flags |= RTCF_DOREDIRECT;