Merge "Type hint against LinkTarget in WatchedItemStore"

diff --combined includes/watcheditem/WatchedItemStore.php
index d33b6ae,0b73fe3..c363029
--- 1/includes/watcheditem/WatchedItemStore.php
--- 2/includes/watcheditem/WatchedItemStore.php
+++ b/includes/watcheditem/WatchedItemStore.php
@@@ -383,7 -383,7 +383,7 @@@ class WatchedItemStore implements Watch
  
        /**
         * @param UserIdentity $user
-        * @param TitleValue[] $titles
+        * @param LinkTarget[] $titles
         * @return bool
         * @throws MWException
         */
@@@ -1120,11 -1120,6 +1120,11 @@@
                }
  
                $oldRev = $this->revisionLookup->getRevisionById( $oldid );
 +              if ( !$oldRev ) {
 +                      // Oldid given but does not exist (probably deleted)
 +                      return false;
 +              }
 +
                $nextRev = $this->revisionLookup->getNextRevision( $oldRev );
                if ( !$nextRev ) {
                        // Oldid given and is the latest revision for this title; clear the timestamp.