fix import error with CallException

1 changed files with 2 additions and 1 deletions
--- a/libagent/device/trezor_defs.py
+++ b/libagent/device/trezor_defs.py
@ -4,7 +4,8 @@
 import os
 import logging

-from trezorlib.client import CallException, PinException
+from trezorlib.client import PinException
+from trezorlib.tools import CallException
 from trezorlib.client import TrezorClient as Client
 from trezorlib.messages import IdentityType, PassphraseAck, PinMatrixAck, PassphraseStateAck