Merge pull request #5 from smokris/clarify-timezone-error

Clarify the log message when there's an error parsing an event's timezone

lib/Event.php

@@ -743,7 +743,7 @@ public function toiCalendar($calendar, $includeFiles = true)
                     }
                     $params['TZID'] = $this->timezone;
                 } catch (Horde_Exception $e) {
-                    Horde::log('Unable to locate the tz database.', 'WARN');
+                    Horde::log('Unable to parse timezone for event ID ' . $this->_id . ': ' . $e, 'WARN');
                 }
             }