Merge pull request #89 from melvinmt/bugfix/4765

fix bug count_all w/ ->object_name (refs #4765)

Author: zeelot

classes/Kohana/ORM.php

@@ -1644,7 +1644,7 @@ public function count_all()
 		$this->_build(Database::SELECT);
 
 		$records = $this->_db_builder->from(array($this->_table_name, $this->_object_name))
-			->select(array(DB::expr('COUNT('.$this->_db->quote_column($this->_primary_key).')'), 'records_found'))
+			->select(array(DB::expr('COUNT('.$this->_db->quote_column($this->_object_name.'.'.$this->_primary_key).')'), 'records_found'))
 			->execute($this->_db)
 			->get('records_found');