Ticket #56191: 56191.diff

src/wp-includes/l10n.php

@@ -1015 +1015 @@
  * @return string|false The translated strings in JSON encoding on success,
  *                      false if the script textdomain could not be loaded.
  */
-function load_script_textdomain( $handle, $domain = 'default', $path = null ) {
+function load_script_textdomain( $handle, $domain = 'default', $path = '' ) {
         $wp_scripts = wp_scripts();
 
         if ( ! isset( $wp_scripts->registered[ $handle ] ) ) {
@@ -1022 +1022 @@
                 return false;
         }
 
-        $path   = untrailingslashit( $path );
+        $path   = untrailingslashit( null !== $path ? $path : '' );
         $locale = determine_locale();
 
         // If a path was given and the handle file exists simply return it.