use of a boolean value for the "qsearch" $block->data variable

(see topic #98370)

git-svn-id: http://piwigo.org/svn/trunk@2813 68402e56-0260-453c-a942-63ccdbb3a9ee

include/menubar.inc.php

@@ -217,7 +217,7 @@ function initialize_menu()
   {
     // quick search block will be displayed only if data['qsearch'] is set
     // to "yes"
-    $block->data['qsearch']='yes';
+    $block->data['qsearch']=true;
 
     // tags link
     $block->data['tags'] =