Update disk space label in add new torrent dialog. Fixes issue #282.

src/addnewtorrentdialog.cpp

@@ -70,6 +70,7 @@ AddNewTorrentDialog::AddNewTorrentDialog(QWidget *parent) :
   ui->save_path_combo->insertSeparator(ui->save_path_combo->count());
   ui->save_path_combo->addItem(tr("Other...", "Other save path..."));
   connect(ui->save_path_combo, SIGNAL(currentIndexChanged(int)), SLOT(onSavePathChanged(int)));
+  connect(ui->save_path_combo, SIGNAL(currentIndexChanged(int)), SLOT(updateDiskSpaceLabel()));
   ui->default_save_path_cb->setVisible(false); // Default path is selected by default
 
   // Load labels