Catch solr exceptions

mobile.netbiblio.php

@@ -357,7 +357,11 @@ class NetBiblio extends WebService
         $count = isset($queryArray['count']) ? (int) $queryArray['count'] : Configuration::get('solr.result_count');
         $start = isset($queryArray['page']) ? $queryArray['page'] * $count : 0;
 
+        try {
             $results = $bs->getResults($start, $count);
+        } catch(SolrClientException $e) {
+            throw new WebException ("SolrError", $e->getMessage(), -700);
+        }
 
         $this->data['count'] = $results['response']['numFound'];
         $this->data['facets'] = $results['facet_counts']['facet_fields'];