ZP-1088 Compare typesafe, remove unsed code.

Released under the Affero GNU General Public License (AGPL) version 3.

src/lib/core/changesmemorywrapper.php

@@ -252,7 +252,6 @@ class ChangesMemoryWrapper extends HierarchyCache implements IImportChanges, IEx
                 // The Zarafa/Kopano HierarchyExporter exports all kinds of changes for folders (e.g. update no. of unread messages in a folder).
                 // These changes are not relevant for the mobiles, as something changes but the relevant displayname and parentid
                 // stay the same. These changes will be dropped and are not sent!
-                $cacheFolder = $this->GetFolder($folder->serverid);
                 if ($folder->equals($this->GetFolder($folder->serverid))) {
                     ZLog::Write(LOGLEVEL_DEBUG, sprintf("ChangesMemoryWrapper->ImportFolderChange(): Change for folder '%s' will not be sent as modification is not relevant.", $folder->displayname));
                     return false;

src/lib/syncobjects/syncobject.php

@@ -148,7 +148,7 @@ abstract class SyncObject extends Streamer {
             }
             else {
                 if (isset($this->$val) && isset($odo->$val)) {
-                    if ($this->$val != $odo->$val){
+                    if ($this->$val !== $odo->$val){
                         ZLog::Write(LOGLEVEL_DEBUG, sprintf("SyncObject->equals() false on field '%s': '%s' != '%s'", $val, Utils::PrintAsString($this->$val), Utils::PrintAsString($odo->$val)));
                         return false;
                     }