Avoiding warning messages

main/inc/lib/search/xapian/XapianIndexer.class.php

@@ -101,22 +101,24 @@ abstract class XapianIndexer {
      */
     function index() {
       try {
+        if (!empty($this->chunks)) {
             foreach ($this->chunks as $chunk) {
                 $doc = new XapianDocument();
                 $this->indexer->set_document($doc);
-
+                if (!empty($chunk->terms)) {
                     foreach ($chunk->terms as $term) {
                         /* FIXME: think of getting weight */
                         $doc->add_term($term['flag'] . $term['name'], 1);
                     }
+                }
     
                 // free-form index all data array (title, content, etc)
+                if (!empty($chunk->data)) {
                     foreach ($chunk->data as $key => $value) {
                         $this->indexer->index_text($value, 1);
                     }
-
+                }    
                 $doc->set_data($chunk->xapian_data, 1);    
-
                 $did = $this->db->add_document($doc);
     
                 //write to disk
@@ -125,6 +127,7 @@ abstract class XapianIndexer {
                 return $did;
             }
         }
+      }
       catch (Exception $e) {
         Display::display_error_message($e->getMessage());
         exit(1);