Settings: Replace count() call with empty() in get_settings_errors() to prevent PHP 7.2 warnings when $wp_settings_errors is null.

Props pross, dd32, westonruter.
See #40109.
Fixes #42498 for trunk.


git-svn-id: https://develop.svn.wordpress.org/trunk@42146 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/template.php

@@ -1457,8 +1457,9 @@ function get_settings_errors( $setting = '', $sanitize = false ) {
 	}
 
 	// Check global in case errors have been added on this pageload.
-	if ( ! count( $wp_settings_errors ) )
+	if ( empty( $wp_settings_errors ) ) {
 		return array();
+	}
 
 	// Filter the results to those of a specific setting if one was set.
 	if ( $setting ) {