fixed jsonrpc import missing in bitcoin.height_tracker, which prevented a useful...

diff --git a/p2pool/bitcoin/height_tracker.py b/p2pool/bitcoin/height_tracker.py
index c820ec2..d22fb7b 100644 (file)
--- a/p2pool/bitcoin/height_tracker.py
+++ b/p2pool/bitcoin/height_tracker.py
@@ -2,7 +2,7 @@ from twisted.internet import defer, task
 from twisted.python import log
 
 from p2pool.bitcoin import data as bitcoin_data
-from p2pool.util import deferral, forest, variable
+from p2pool.util import deferral, forest, jsonrpc, variable
 
 class HeaderWrapper(object):
     __slots__ = 'hash previous_hash'.split(' ')