fix missing import

plugins/trustedcoin/qt.py

@@ -1,3 +1,5 @@
+from functools import partial
+
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
 

plugins/trustedcoin/trustedcoin.py

@@ -25,7 +25,6 @@ import json
 from hashlib import sha256
 from urlparse import urljoin
 from urllib import quote
-from functools import partial
 
 import electrum
 from electrum import bitcoin