ZP-762 Check if collection is synchronized before exporting changes in

Partial mode.

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

src/lib/request/sync.php

@@ -572,11 +572,13 @@ class Sync extends RequestProcessor {
 
             // update a few values
             foreach($sc as $folderid => $spa) {
-                // manually set getchanges parameter for this collection
-                $sc->AddParameter($spa, "getchanges", true);
+                // manually set getchanges parameter for this collection if it is synchronized
+                if ($spa->HasSyncKey()) {
+                    $sc->AddParameter($spa, "getchanges", true);
 
-                // announce WindowSize to DeviceManager
-                self::$deviceManager->SetWindowSize($folderid, $spa->GetWindowSize());
+                    // announce WindowSize to DeviceManager
+                    self::$deviceManager->SetWindowSize($folderid, $spa->GetWindowSize());
+                }
             }
             if (!$sc->HasCollections())
                 $status = SYNC_STATUS_SYNCREQUESTINCOMPLETE;