RSS Namespaces - Unsupported Operand Types when using fields

Description:

I'm using Views Atom Module together with views to render the Atom Feed.

After the configuration of the view i got the following error:

Unsupported operand types in sites/all/modules/views/plugins/views_plugin_row_rss_fields.inc on line 120

if (function_exists('rdf_get_namespaces')) {
      // Merge RDF namespaces in the XML namespaces in case they are used
      // further in the RSS content.
      $xml_rdf_namespaces = array();
      foreach (rdf_get_namespaces() as $prefix => $uri) {
        $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;
      }
      $this->view->style_plugin->namespaces += $xml_rdf_namespaces;
    }

This error occurs because $this->view->style_plugin->namespaces is not set at that point when it runs through.

Solution:

Here is my suggestion:

if (function_exists('rdf_get_namespaces')) {
      // Merge RDF namespaces in the XML namespaces in case they are used
      // further in the RSS content.
      $xml_rdf_namespaces = array();
      foreach (rdf_get_namespaces() as $prefix => $uri) {
        $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;
      }

      //check if namespace array is available
      if (isset($this->view->style_plugin->namespaces) && is_array($this->view->style_plugin->namespaces)) {
        $this->view->style_plugin->namespaces += $xml_rdf_namespaces;
      }
      else {
        $this->view->style_plugin->namespaces = $xml_rdf_namespaces;
      }

Does anyone have a better solution?