fix interface number handling

setup.py

@@ -3,7 +3,7 @@ from setuptools import setup
 
 setup(
     name='trezor',
-    version='0.6.10',
+    version='0.6.11',
     author='Bitcoin TREZOR',
     author_email='info@bitcointrezor.com',
     description='Python library for communicating with TREZOR Bitcoin Hardware Wallet',

trezorlib/transport_hid.py

@@ -46,7 +46,7 @@ class HidTransport(Transport):
 
             if (vendor_id, product_id) in DEVICE_IDS:
                 devices.setdefault(serial_number, [None, None])
-                if interface_number == 0: # normal link
+                if interface_number == 0 or interface_number == -1: # normal link
                     devices[serial_number][0] = path
                 elif interface_number == 1: # debug link
                     devices[serial_number][1] = path