Fix undefined index warning

Author: Jason Oster

README

@@ -93,6 +93,8 @@ Changes:
 		More ICS input sanitizing; prevent HTML/XSS injection
 	Bug fixes:
 		Webcal caching now works like local caching with save_parsed_cals
+		Performance improvements with remote calendars; reducing the number
+			of file reads/HTTP requests made for each calendar
 		Print view missing some events
 		Setting time format in preferences page
 		Default calendar selections in listbox picker
@@ -104,8 +106,10 @@ Changes:
 		Recurring events across multiple versions of PHP; thanks to Len and gueba!
 		Better handling of URLs and email addresses in event descriptions
 		Navigation forms breaking PHP transparent SID
+		Fix strange characters displayed in Locations with % characters
 	New features:
 		Event information displayed with Nice Titles
+			Fixes line breaks and some HTML in event tooltips
 		Attendee/organizer parsing and email address hyperlinking
 		Better display of tabs/line breaks in calendar events
 		Strip "blocked" protocols, added by some mail servers

functions/ical_parser.php

@@ -63,7 +63,8 @@
 						// At this point, all calendars are up-to-date, so we can simply used the pre-parsed data
 						$parse_file = false;
 						$calendar_name = $master_array['calendar_name'];
-						$calendar_tz = $master_array['calendar_tz'];
+						if (isset($master_array['calendar_tz']))
+							$calendar_tz = $master_array['calendar_tz'];
 					}
 				}
 			}
@@ -94,7 +95,8 @@
 					if ($master_array['-1'] == 'valid cal file') {
 						$parse_file = false;
 						$calendar_name = $master_array['calendar_name'];
-						$calendar_tz = $master_array['calendar_tz'];
+						if (isset($master_array['calendar_tz']))
+							$calendar_tz = $master_array['calendar_tz'];
 					}
 				}
 			}