glib-2.0: Guard Pid.to_string() with GLIB_2_50 to deal with G_PID_FORMAT

Otherwise building with glib-2.0 < 2.50 breaks due availability check of
GLib.Pid.FORMAT.

diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index c67d4143eba2e99a711c564356c99ccab158e0ae..89e6dd34eb3b4d669ee848c0b6de78593d59a023 100644 (file)
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -1894,8 +1894,10 @@ namespace GLib {
                [Version (since = "2.50")]
                public const string FORMAT;
 
+#if GLIB_2_50
                [CCode (cname = "g_strdup_printf", instance_pos = -1)]
                public string to_string (string format = "%" + FORMAT);
+#endif
        }
 
        public delegate void ChildWatchFunc (Pid pid, int status);