ensure that the number of codes is a string that looks like an integer

Author: stevebagwell

themes/material/mfa/low-on-backup-codes.php

@@ -27,9 +27,10 @@
                     </h1>
                 </div>
 
+
                 <div class="mdl-card__title center" >
                     <p class="mdl-card__subtitle-text">
-                        <?= $this->t('{material:mfa:running_out_info}', ['{numBackupCodesRemaining}' => (int)$this->data['numBackupCodesRemaining']]) ?>
+                        <?= $this->t('{material:mfa:running_out_info}', ['{numBackupCodesRemaining}' => (string)(int)$this->data['numBackupCodesRemaining']]) ?>
                     </p>
                 </div>