missing imports in version_getter

gui/gui_classic/version_getter.py

@@ -16,14 +16,14 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-import threading, httplib, re
+import threading, httplib, re, socket
 import webbrowser
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
 import PyQt4.QtCore as QtCore
 
 from electrum.i18n import _
-from electrum import ELECTRUM_VERSION
+from electrum import ELECTRUM_VERSION, print_error
 
 class VersionGetter(threading.Thread):