silence some warnings

db_server/deploy.provision.inc

@@ -28,5 +28,5 @@ function drush_provision_mysql_provision_deploy_rollback($url = NULL) {
 function drush_provision_mysql_post_provision_deploy($url = NULL) {
   provision_path('unlink', drush_get_option('sites_path') .'/'. $url .'/database.sql', TRUE,
     dt("Removed dump file @path after restoring from it"),
-    dt("Could not remove dump file @path"), DRUSH_PERM_ERROR);
+    dt("Could not remove dump file @path"), 'DRUSH_PERM_ERROR');
 }

db_server/restore.provision.inc

@@ -42,7 +42,7 @@ function drush_provision_mysql_pre_provision_restore_rollback($url = NULL) {
 function drush_provision_mysql_post_provision_restore($url = NULL) {
   provision_path('unlink', drush_get_option('sites_path') . '/' . $url .'/database.sql', TRUE,
     dt("Removed dump file @path after restoring from it"),
-    dt("Could not remove dump file @path"), DRUSH_PERM_ERROR);
+    dt("Could not remove dump file @path"), 'DRUSH_PERM_ERROR');
 
   $db_grant_host = _provision_mysql_grant_host(
       drush_get_option('db_host', '', 'site'), 

platform/restore.provision.inc

@@ -63,7 +63,7 @@ function drush_provision_drupal_provision_restore($url) {
   provision_path("switch_paths", $old, $new ,
     dt('Swapping out the @path and @confirm directories was successful.'),
     dt('Swapping the @path and @confirm directories has failed.'),
-    DRUSH_PERM_ERROR);
+    'DRUSH_PERM_ERROR');
   // make sure it has the latest site data available
   _provision_drupal_create_settings_file($url);
   provision_save_site_data($url);