Merge pull request #3437 from atm-ph/3.8_fix_error_conf_class

FIX error creating default object from empty value

htdocs/core/class/conf.class.php

@@ -110,6 +110,7 @@ class Conf
 		$this->bank				= new stdClass();
 		$this->notification		= new stdClass();
 		$this->mailing			= new stdClass();
+		$this->expensereport	= new stdClass();
 	}