[NET_SCHED]: Use typeful attribute parsing helpers

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/cls_basic.c b/net/sched/cls_basic.c
index 58444fe..0c872a7 100644
--- a/net/sched/cls_basic.c
+++ b/net/sched/cls_basic.c
@@ -150,7 +150,7 @@
 		goto errout;
 
 	if (tb[TCA_BASIC_CLASSID]) {
-		f->res.classid = *(u32*)nla_data(tb[TCA_BASIC_CLASSID]);
+		f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]);
 		tcf_bind_filter(tp, &f->res, base);
 	}