From 618d5edf36c982a5498957dd935ea1a8cb244fed Mon Sep 17 00:00:00 2001
From: Alexander Demidov <dimti@bk.ru>
Date: Tue, 18 Feb 2014 17:35:45 +0400
Subject: [PATCH] =?UTF-8?q?MIRSPORTA-255=20=D0=94=D0=BE=D0=B1=D0=B0=D0=B2?=
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---
 Image.class.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Image.class.php b/Image.class.php
index 96c4df1..a6d386b 100644
--- a/Image.class.php
+++ b/Image.class.php
@@ -44,7 +44,14 @@ abstract class Image extends File
      */
     public static function getIsSubClass($class)
     {
-        return (get_parent_class($class) == __CLASS__);
+        $parent_class = get_parent_class($class);
+        if ($parent_class == __CLASS__) {
+            return true;
+        }
+        if (get_parent_class($parent_class)) {
+            return self::getIsSubClass($parent_class);
+        }
+        return false;
     }
 
     public static function getSizes()