Prevent PHP Warnings when using Custom Logo with no params

The parsing of defaults assumes that $args will be an array. This solves it for Custom Logo the same way it is solved for custom-header and custom-background.

Props obenland.
Fixes #36332.



git-svn-id: https://develop.svn.wordpress.org/trunk@37092 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/theme.php

@@ -1560,6 +1560,9 @@ function add_theme_support( $feature ) {
 			break;
 
 		case 'custom-logo':
+			if ( ! is_array( $args ) ) {
+				$args = array( 0 => array() );
+			}
 			$defaults = array(
 				'width'       => null,
 				'height'      => null,