[FIX] Undefined variables: crm_caldav

bzr revid: hmo@tinyerp.com-20100817080846-2pxso2jyonclu0qi

addons/crm_caldav/crm_caldav.py

@@ -20,6 +20,7 @@
 ##############################################################################
 
 from osv import fields, osv
+from base_calendar import base_calendar
 from crm import crm
 from caldav import calendar
 from datetime import datetime