Properly import all-day events in Calendar

Summary: Ref T10747. The transaction version of this copies the "all day" flag over properly, but this non-transaction version needs to copy it explicitly.

Test Plan: Imported an all-day event, saw it come in as all-day.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10747

Differential Revision: https://secure.phabricator.com/D16770

src/applications/calendar/import/PhabricatorCalendarImportEngine.php

@@ -520,6 +520,8 @@ abstract class PhabricatorCalendarImportEngine
       ->setStartDateTime($start_datetime)
       ->setEndDateTime($end_datetime);
 
+    $event->setIsAllDay($start_datetime->getIsAllDay());
+
     // TODO: This should be transactional, but the transaction only accepts
     // simple frequency rules right now.
     $rrule = $node->getRecurrenceRule();