tvpassport.com - Added optional chaining on elements that may not exist

Added optional chaining on elements that are expected to not exist on the guide listings such as 'episodetitle' and 'year', this fixes the pull for 25 channels that were failing (out of 19,287 channels).

sites/tvpassport.com/tvpassport.com.config.js

@@ -133,11 +133,11 @@ function parseTitle($item) {
 }
 
 function parseSubTitle($item) {
-  return $item('*').data('episodetitle').toString() || null
+  return $item('*').data('episodetitle')?.toString() || null
 }
 
 function parseYear($item) {
-  return $item('*').data('year').toString() || null
+  return $item('*').data('year')?.toString() || null
 }
 
 function parseCategory($item) {
@@ -200,3 +200,4 @@ function parseCurrentTimezone(content) {
 
   return $('#timezone_selector').val()
 }
+