unable to delete a calendar item

[luciogagarin]

Hi,
I tested your module and works fine except deleting calendar items.
The error is the below:

File "/opt/openerp/server/7.0/openerp/addons/google_api/google_calendar.py", line 189, in unlink
if id['google_event_id'] and id['user_id']:
TypeError: string indices must be integers, not str

how to correct it ? thank you!