Fix 'left' parameter on seed

lib/torrent.js

@@ -300,6 +300,14 @@ class Torrent extends EventEmitter {
       })
     }
 
+    if (this.info) {
+      // if full metadata was included in initial torrent id, use it immediately. Otherwise,
+      // wait for torrent-discovery to find peers and ut_metadata to get the metadata.
+      this._onMetadata(this)
+    } else if (this.xs) {
+      this._getMetadataFromServer()
+    }
+
     // begin discovering peers via DHT and trackers
     this.discovery = new Discovery({
       infoHash: this.infoHash,
@@ -334,14 +342,6 @@ class Torrent extends EventEmitter {
     this.discovery.on('warning', (err) => {
       this.emit('warning', err)
     })
-
-    if (this.info) {
-      // if full metadata was included in initial torrent id, use it immediately. Otherwise,
-      // wait for torrent-discovery to find peers and ut_metadata to get the metadata.
-      this._onMetadata(this)
-    } else if (this.xs) {
-      this._getMetadataFromServer()
-    }
   }
 
   _getMetadataFromServer () {