Zend_Search_Lucene: search through empty indices list is corrected. ZF-7979.

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@19036 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Search/Lucene/MultiSearcher.php

@@ -456,6 +456,10 @@ class Zend_Search_Lucene_Interface_MultiSearcher implements Zend_Search_Lucene_I
      */
     public function find($query)
     {
+        if (count($this->_indices) == 0) {
+            return array();
+        }
+
         $hitsList = array();
 
         $indexShift = 0;