WIn32 compile fix.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1764 c046a42c-6fe2-441c-8c8c-71466251a162

tap-win32.c

@@ -671,7 +671,7 @@ int tap_win32_init(VLANState *vlan, const char *ifname)
         return -1;
     }
 
-    s->vc = qemu_new_vlan_client(vlan, tap_receive, s);
+    s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s);
     
     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
              "tap: ifname=%s", ifname);