Fix Delete Torrent + Data for newly added magnet links

Before, if you added a magnet link and then tried to delete the torrent plus data before the file list was loaded, it would fail and throw an uncaught error

Fixes #803

src/renderer/controllers/torrent-list-controller.js

@@ -263,7 +263,7 @@ function deleteFile (path) {
 // Delete all files in a torrent
 function moveItemToTrash (torrentSummary) {
   var filePath = TorrentSummary.getFileOrFolder(torrentSummary)
-  ipcRenderer.send('moveItemToTrash', filePath)
+  if (filePath) ipcRenderer.send('moveItemToTrash', filePath)
 }
 
 function showItemInFolder (torrentSummary) {

src/renderer/lib/torrent-summary.js

@@ -52,5 +52,6 @@ function getByKey (state, torrentKey) {
 // module. Store root folder explicitly to avoid hacky path processing below.
 function getFileOrFolder (torrentSummary) {
   var ts = torrentSummary
+  if (!ts.path || !ts.files || ts.files.length === 0) return null
   return path.join(ts.path, ts.files[0].path.split('/')[0])
 }