[libdazzle] recursive-monitor: use old style header guards

[Christian Hergert <chergert src gnome org>]

commit e6a154dd948fb52001932c5af8c6aa274fe6175c
Author: Christian Hergert <chergert redhat com>
Date:   Thu Nov 30 02:26:36 2017 -0800

    recursive-monitor: use old style header guards

 src/files/dzl-recursive-file-monitor.h |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/files/dzl-recursive-file-monitor.h b/src/files/dzl-recursive-file-monitor.h
index 2174875..355d082 100644
--- a/src/files/dzl-recursive-file-monitor.h
+++ b/src/files/dzl-recursive-file-monitor.h
@@ -16,7 +16,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#pragma once
+#ifndef DZL_RECURSIVE_FILE_MONITOR_H
+#define DZL_RECURSIVE_FILE_MONITOR_H
 
 #include <gio/gio.h>
 
@@ -31,3 +32,5 @@ GFile                   *dzl_recursive_file_monitor_get_root (DzlRecursiveFileMo
 void                     dzl_recursive_file_monitor_cancel   (DzlRecursiveFileMonitor *self);
 
 G_END_DECLS
+
+#endif /* DZL_RECURSIVE_FILE_MONITOR_H */