Automatic conversion of false to array is deprecated hotfix

Author: Timi-Artturi Mäkelä

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+[unreleased]
+
+[php-81-automatic-conversion-hotfix]
+### Fixed
+- Fixes "Automatic conversion of false to array is deprecated" on Dust.php
+
+[released]
 ## [1.38.1]
 
 ### Fixed

src/Renderer/Dust.php

@@ -73,6 +73,12 @@ public function __construct( string $template ) {
     public function render( array $fields ) : string {
         $compiled = self::$dust->compileFile( $this->template );
 
+        // In same cases this might be false.
+        // We need to set key as an array after PHP 8.1 in these situations.
+        if ( empty( $fields['data'] ) ) {
+            $fields['data'] = [];
+        }
+
         // Pass on the block data
         $fields['data']['block'] = $fields['block'];