[DCCP]: fix memory leak and clean up style - dccp_feat_empty_confirm()

There's a memory leak in net/dccp/feat.c::dccp_feat_empty_confirm().  If we
hit the 'default:' case of the 'switch' statement, then we return without
freeing 'opt', thus leaking 'struct dccp_opt_pend' bytes.

The leak is fixed easily enough by adding a kfree(opt); before the return
statement.

The patch also changes the layout of the 'switch' to be more in line with
CodingStyle.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/feat.c

@@ -327,10 +327,16 @@ static void dccp_feat_empty_confirm(struct dccp_minisock *dmsk,
 	}
 
 	switch (type) {
-	case DCCPO_CHANGE_L: opt->dccpop_type = DCCPO_CONFIRM_R; break;
-	case DCCPO_CHANGE_R: opt->dccpop_type = DCCPO_CONFIRM_L; break;
-	default:	     DCCP_WARN("invalid type %d\n", type); return;
-
+	case DCCPO_CHANGE_L:
+		opt->dccpop_type = DCCPO_CONFIRM_R;
+		break;
+	case DCCPO_CHANGE_R:
+		opt->dccpop_type = DCCPO_CONFIRM_L;
+		break;
+	default:
+		DCCP_WARN("invalid type %d\n", type);
+		kfree(opt);
+		return;
 	}
 	opt->dccpop_feat = feature;
 	opt->dccpop_val	 = NULL;