Fix PHP warning

main/mySpace/session.php

@@ -67,7 +67,7 @@ if (api_is_drh() || api_is_session_admin() || api_is_platform_admin()) {
             $actionsLeft .= $item;
         }
     }
-
+    $actionsRight = '';
     if (count($a_sessions) > 0) {
         $actionsRight = Display::url(
             Display::return_icon('printer.png', get_lang('Print'), array(), 32),
@@ -80,7 +80,10 @@ if (api_is_drh() || api_is_session_admin() || api_is_platform_admin()) {
         );
     }
 
-    $toolbar = Display::toolbarAction('toolbar-session', $content = array( 0 => $actionsLeft, 1 => $actionsRight ));
+    $toolbar = Display::toolbarAction(
+        'toolbar-session',
+        $content = array(0 => $actionsLeft, 1 => $actionsRight)
+    );
     echo $toolbar;
 
     echo Display::page_header(get_lang('YourSessionsList'));