Fix build on old kernels

Cope with BTRFS_SUPER_MAGIC not being defined.

diff --git a/glib/gfileutils.c b/glib/gfileutils.c
index fff6492..a87f0e9 100644 (file)
--- a/glib/gfileutils.c
+++ b/glib/gfileutils.c
@@ -968,7 +968,7 @@ write_to_temp_file (const gchar  *contents,
       goto out;
     }
 
-#ifdef __linux__
+#ifdef BTRFS_SUPER_MAGIC
   {
     struct statfs buf;