[-] BO : fix product page display when saving pack

git-svn-id: http://dev.prestashop.com/svn/v1/branches/1.5.x@12484 b9a71923-0436-4b27-9f14-aed3839534dd

classes/AdminController.php

@@ -1034,7 +1034,8 @@ class AdminControllerCore extends Controller
 		}
 		else if ($opt)
 		{
-			$this->object = new $this->className();
+			if (!$this->object)
+				$this->object = new $this->className();
 			return $this->object;
 		}
 		else