Handle missing app_name in vector interface.

hardbyte · hardbyte · commit 232e6dbfe306 · 2019-02-28T14:28:18.000+11:00
Closes hardbyte#515
diff --git a/can/interfaces/vector/canlib.py b/can/interfaces/vector/canlib.py
@@ -85,7 +85,7 @@ def __init__(self, channel, can_filters=None, poll_interval=0.01,
         else:
             # Assume comma separated string of channels
             self.channels = [int(ch.strip()) for ch in channel.split(',')]
-        self._app_name = app_name.encode()
+        self._app_name = app_name.encode() if app_name is not None else ''
         self.channel_info = 'Application %s: %s' % (
             app_name, ', '.join('CAN %d' % (ch + 1) for ch in self.channels))
 
