[phodav] Check glib version for disk_usage() API

[Marc-Andre Lureau <malureau src gnome org>]

commit 9f87d91a7e0966c2282e3f62c159f1b0dce72585
Author: Marc-André Lureau <marcandre lureau gmail com>
Date:   Thu Jan 23 14:42:04 2014 +0100

    Check glib version for disk_usage() API

 libphodav/phodav-server.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/libphodav/phodav-server.c b/libphodav/phodav-server.c
index ac41b40..db39672 100644
--- a/libphodav/phodav-server.c
+++ b/libphodav/phodav-server.c
@@ -1371,6 +1371,7 @@ end:
   return node;
 }
 
+#if GLIB_CHECK_VERSION (2, 38, 0)
 static xmlNodePtr
 prop_quota_used (PathHandler *handler, PropFind *pf,
                  const gchar *path, GFileInfo *info, xmlNsPtr ns)
@@ -1378,7 +1379,7 @@ prop_quota_used (PathHandler *handler, PropFind *pf,
   gint status = SOUP_STATUS_OK;
   PhodavServer *self = handler->self;
   xmlNodePtr node = xmlNewNode (ns, BAD_CAST "quota-used-bytes");
-  guint64 disk_usage;
+  guint64 disk_usage = 0;
   GError *error = NULL;
   gchar *tmp = NULL;
 
@@ -1405,6 +1406,7 @@ end:
   PROP_SET_STATUS (node, status);
   return node;
 }
+#endif
 
 static void
 prop_add (GList **stat, xmlNodePtr node)
@@ -1431,7 +1433,9 @@ static const struct _PropList
   PROP (supportedlock, 0),
   PROP (lockdiscovery, 0),
   { "quota-available-bytes", prop_quota_available, },
+#if GLIB_CHECK_VERSION (2, 38, 0)
   { "quota-used-bytes", prop_quota_used, }
+#endif
 };
 
 static xmlNodePtr