Pass root_mail_recipient down to postfix::files

manifests/files.pp

 class postfix::files (
+  $smtp_listen,
+  $root_mail_recipient,
   $use_amavisd,
   $use_dovecot_lda,
   $use_schleuder,
   $use_sympa,
-  $smtp_listen,
   $mail_user,
   $master_smtp,
   $master_smtps,
@@ -75,7 +76,7 @@ class postfix::files (
   }
 
   mailalias {'root':
-    recipient => $postfix::root_mail_recipient,
+    recipient => $root_mail_recipient,
     notify    => Exec['newaliases'],
   }
 }

manifests/init.pp

@@ -43,11 +43,12 @@ class postfix (
 
   class { 'postfix::packages': } ->
   class { 'postfix::files':
+    smtp_listen         => $smtp_listen,
+    root_mail_recipient => $root_mail_recipient,
     use_amavisd         => $use_amavisd,
     use_dovecot_lda     => $use_dovecot_lda,
     use_schleuder       => $use_schleuder,
     use_sympa           => $use_sympa,
-    smtp_listen       => $smtp_listen,
     mail_user           => $mail_user,
     master_smtp         => $master_smtp,
     master_smtps        => $master_smtps,