fix JSD compile error

      if (projItem) {

        // Tree traversal is top down so we dont need to do this check for imagelists?

        if (projItem->isImage() && 

            !selectedObservationNumbers.contains(projItem->image()->observationNumber())) {

          selectedObservationNumbers.append(projItem->image()->observationNumber());

        if (projItem->isImage()) {

          // Grab the observation up front so we don't need to re-compose the observation number

          // more than once (@todo: this should not be necessary when 5026 is integrated)

          const QString observationNumber = projItem->image()->observationNumber();

          if (!selectedObservationNumbers.contains(observationNumber)) {

            selectedObservationNumbers.append(observationNumber);

          }

        }

        else if (projItem->isImageList()) {

          // Use the proxymodel's children as it might not include all of the sourcemodel's children