Merge pull request #14526 from cakephp/3.x-php74

Backport PHP74 fixes

src/I18n/Parser/PoFileParser.php

@@ -80,7 +80,7 @@ class PoFileParser
 
         $messages = [];
         $item = $defaults;
-        $stage = null;
+        $stage = [];
 
         while ($line = fgets($stream)) {
             $line = trim($line);
@@ -89,7 +89,7 @@ class PoFileParser
                 // Whitespace indicated current item is done
                 $this->_addMessage($messages, $item);
                 $item = $defaults;
-                $stage = null;
+                $stage = [];
             } elseif (substr($line, 0, 7) === 'msgid "') {
                 // We start a new msg so save previous
                 $this->_addMessage($messages, $item);