[vala/staging] glib-2.0: Add to_string() for GLib.PollFd and GLib.Pid

[Rico Tzschichholz <ricotz src gnome org>]

commit cf4a50cbbfd45f88256c1ac669dc511f634bb54f
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Dec 5 18:03:13 2019 +0100

    glib-2.0: Add to_string() for GLib.PollFd and GLib.Pid

 vapi/glib-2.0.vapi | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 7e55b7bbd..6453ee841 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -1952,6 +1952,9 @@ namespace GLib {
                [CCode (cname = "G_PID_FORMAT")]
                [Version (since = "2.50")]
                public const string FORMAT;
+
+               [CCode (cname = "g_strdup_printf", instance_pos = -1)]
+               public string to_string (string format = "%" + FORMAT);
        }
 
        public delegate void ChildWatchFunc (Pid pid, int status);
@@ -1973,6 +1976,12 @@ namespace GLib {
                public int fd;
                public IOCondition events;
                public IOCondition revents;
+
+               [CCode (cname = "G_POLLFD_FORMAT")]
+               public const string FORMAT;
+
+               [CCode (cname = "g_strdup_printf", instance_pos = -1)]
+               public string to_string (string format = "%" + FORMAT);
        }
 
        [Compact]