[svn r14309] Light fixes to user selected theme feature (see FS#2204)

main/inc/lib/formvalidator/Element/select_theme.php

@@ -39,7 +39,7 @@ class HTML_QuickForm_Select_Theme extends HTML_QuickForm_select
 		$this->_values = array();
 		foreach ($themes as $theme)
 		{
-			$this->addOption($theme,$theme);
+			$this->addOption((empty($theme)?'--':$theme),$theme);
 		}
 	}
 }

main/inc/lib/main_api.lib.php

@@ -1826,7 +1826,7 @@ function api_get_languages()
 function api_get_themes()
 {
 	$cssdir = api_get_path(SYS_PATH).'main/css/';
-	$list = array();
+	$list = array('');
 	if (is_dir($cssdir))
 	{
 		$themes = scandir($cssdir);