Avoid allocating memory when checking interface (#588)

Not a big deal, but there isn't a need to allocate an object to check that `*Node` satisfies `bencode.Unmarshaler`.

diff --git a/metainfo/nodes.go b/metainfo/nodes.go
index 58504d921c39ce38fa3279c71e52ae9e8e40936f..ae7fdbb85500b6fa2f96b11b6594eb540cbe94c3 100644 (file)
--- a/metainfo/nodes.go
+++ b/metainfo/nodes.go
@@ -11,7 +11,7 @@ import (
 type Node string
 
 var (
-       _ bencode.Unmarshaler = new(Node)
+       _ bencode.Unmarshaler = (*Node)(nil)
 )
 
 func (n *Node) UnmarshalBencode(b []byte) (err error) {