DAViCal/davical — pull request #34 by stuehmer (2014-10-24 10:49:57+00:00)
Title: Fix problem when curl returns -1 for lastmodified header

See dicussion here: http://sourceforge.net/p/davical/mailman/message/31891908/ Thanks to Damien MASCRÉ for the fix.

The fix solved a problem for me when external calendars would never be fetched.