fix RLMQueryUtil.mm line 68

iOSClient/Main/CCMain.m

@@ -3655,6 +3655,10 @@
     
     // Controllo data lettura Data Source
     tableDirectory *tableDirectory = [[NCManageDatabase sharedInstance] getTableDirectoryWithPredicate:[NSPredicate predicateWithFormat:@"account == %@ AND serverUrl == %@", appDelegate.activeAccount, serverUrl]];
+    if (tableDirectory == nil) {
+        return;
+    }
+    
     // Get MetadataFolder
     if ([serverUrl isEqualToString:[CCUtility getHomeServerUrlActiveUrl:appDelegate.activeUrl]])
         _metadataFolder = [[NCManageDatabase sharedInstance] getMetadataWithPredicate:[NSPredicate predicateWithFormat:@"account == %@ AND serverUrl == %@", appDelegate.activeAccount, k_serverUrl_root]];