src/sys/net/if_pflow.c - fix kernel builds without bpfilter

[Gleydson Soares]

Hi,

protect bpfilter portion with #if NBPFILTER > 0.
fix kernel builds without bpfilter.

OK ?
Index: if_pflow.c
===================================================================
RCS file: /cvs/src/sys/net/if_pflow.c,v
retrieving revision 1.21
diff -u -p -r1.21 if_pflow.c
--- if_pflow.c  30 Oct 2012 12:09:05 -0000      1.21
+++ if_pflow.c  8 Nov 2012 13:49:13 -0000
@@ -1106,7 +1106,9 @@ pflow_sendout_mbuf(struct pflow_softc *s
 {
        struct udpiphdr *ui;
        u_int16_t        len = m->m_pkthdr.len;
+#if NBPFILTER > 0
        struct ifnet    *ifp = &sc->sc_if;
+#endif
        struct ip       *ip;
        int              err;