Fix lots of warnings that pop up when we're in E_STRICT mode. They're

mostly issues around uninitialized variables, calling non-static
functions in a static context, calling Session functions directly
instead of on its singleton, passing non-variables by reference, and
subclasses not using the same interface as the parent class.

modules/comment/controllers/admin_comments.php

@@ -92,6 +92,7 @@ class Admin_Comments_Controller extends Admin_Controller {
   }
 
   private function _counts() {
+    $counts = new stdClass();
     $counts->unpublished = 0;
     $counts->published = 0;
     $counts->spam = 0;