fixed #322 blobURL cleanup

Couldn't find tests to go along with the changes
webtorrent · feross · Jul 15, 2015 · Jul 15, 2015 · Jul 15, 2015 · Jul 15, 2015
commit 0bb147275d6f188c45803bb49b71858f0f4cc8e6
diff --git a/lib/torrent.js b/lib/torrent.js
@@ -362,7 +362,10 @@ Torrent.prototype.destroy = function (cb) {
     clearInterval(self._rechokeIntervalId)
     self._rechokeIntervalId = null
   }
-
+
+  self.files.forEach(function (file) {
+    if (file._blobURL) window.URL.revokeObjectURL(file._blobURL)
+  })
   if (self._torrentFileURL) window.URL.revokeObjectURL(self._torrentFileURL)
 
   var tasks = []