Simplify CI_Upload::initialize() defaults reset

ci_upload_initialize.diff

diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 983d832..686f27d 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -301,41 +301,16 @@ class CI_Upload {
 	 */
 	public function initialize($config = array())
 	{
-		$defaults = array(
-					'max_size'			=> 0,
-					'max_width'			=> 0,
-					'max_height'			=> 0,
-					'min_width'			=> 0,
-					'min_height'			=> 0,
-					'max_filename'			=> 0,
-					'max_filename_increment'	=> 100,
-					'allowed_types'			=> '',
-					'file_temp'			=> '',
-					'file_name'			=> '',
-					'orig_name'			=> '',
-					'file_type'			=> '',
-					'file_size'			=> NULL,
-					'file_ext'			=> '',
-					'file_ext_tolower' => FALSE,
-					'upload_path'			=> '',
-					'overwrite'			=> FALSE,
-					'encrypt_name'			=> FALSE,
-					'is_image'			=> FALSE,
-					'image_width'			=> NULL,
-					'image_height'			=> NULL,
-					'image_type'			=> '',
-					'image_size_str'		=> '',
-					'error_msg'			=> array(),
-					'remove_spaces'			=> TRUE,
-					'detect_mime'			=> TRUE,
-					'xss_clean'			=> FALSE,
-					'mod_mime_fix'			=> TRUE,
-					'temp_prefix'			=> 'temp_file_',
-					'client_name'			=> ''
-				);
-
-		foreach ($defaults as $key => $val)
+		$defaults = new ReflectionClass($this);
+		$defaults = $defaults->getDefaultProperties();
+
+		foreach (array_keys($defaults) as $key)
 		{
+			if ($key[0] === '_')
+			{
+				continue;
+			}
+
 			if (isset($config[$key]))
 			{
 				$method = 'set_'.$key;
@@ -350,7 +325,7 @@ class CI_Upload {
 			}
 			else
 			{
-				$this->$key = $val;
+				$this->$key = $defaults[$key];
 			}
 		}