bug in google travel time

[Danielhiversen]

Description:
Fixes a bug in google travel time, when no options are sat.

16-05-22 19:31:31 ERROR (MainThread) [homeassistant.components.sensor] Error while setting up platform google_travel_time
Traceback (most recent call last):
  File "/mnt/dokumneter/privat/home-assistant/homeassistant/helpers/entity_component.py", line 109, in _setup_platform
    discovery_info)
  File "/mnt/dokumneter/privat/home-assistant/homeassistant/components/sensor/google_travel_time.py", line 99, in setup_platform
    titled_mode = options.get(CONF_MODE).title()
AttributeError: 'NoneType' object has no attribute 'title'

Checklist:

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.

[balloob]

Only see this one right now. Is still relevant with the recent fixes that went out ?

CC @robbiet480

[Danielhiversen]

I do not think this is fixed with the latest fixes

[balloob]

Alrighty 🐬

[balloob]

These are the kind of bugs that are totally fine to merge yourself btw!