add try to capture possible error

src/interface.py

@@ -640,7 +640,7 @@ class DelugeGTK:
 
     def open_folder(self, widget):
         unique_ids = self.get_selected_torrent_rows()
-#        try:
+        try:
             for uid in unique_ids:
                 if self.config.get("file_manager") == 0:
                     command = "/usr/bin/konqueror"
@@ -648,11 +648,10 @@ class DelugeGTK:
                     command = "/usr/bin/nautilus"
                 if self.config.get("file_manager") == 2:
                     command = "/usr/bin/thunar"
-#               print "command %s uid %i dir %s\n" %(command, uid, self.manager.unique_IDs[uid].save_dir)
             os.system('%s %s' %(command, self.manager.unique_IDs[uid].save_dir))
             self.update()
-#        except KeyError:
- #           pass
+        except KeyError:
+            pass
 
     def tor_start(self, widget):
         unique_ids = self.get_selected_torrent_rows()