[glib] g_unix_signal_source_new: Add SIGWINCH

[Matthias Clasen <matthiasc src gnome org>]

commit 47a02c85610f4036681c9728b7339dcb08f64fc4
Author: Jan Alexander Steffens (heftig) <jan steffens gmail com>
Date:   Thu Mar 9 10:56:32 2017 +0100

    g_unix_signal_source_new: Add SIGWINCH
    
    Assume this won't go into 2.52 anymore, so say it was added in 2.54.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769534

 glib/glib-unix.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/glib/glib-unix.c b/glib/glib-unix.c
index 6203889..d666a06 100644
--- a/glib/glib-unix.c
+++ b/glib/glib-unix.c
@@ -187,7 +187,7 @@ g_unix_set_fd_nonblocking (gint       fd,
  * Create a #GSource that will be dispatched upon delivery of the UNIX
  * signal @signum.  In GLib versions before 2.36, only `SIGHUP`, `SIGINT`,
  * `SIGTERM` can be monitored.  In GLib 2.36, `SIGUSR1` and `SIGUSR2`
- * were added.
+ * were added. In GLib 2.54, `SIGWINCH` was added.
  *
  * Note that unlike the UNIX default, all sources which have created a
  * watch will be dispatched, regardless of which underlying thread
@@ -216,7 +216,8 @@ GSource *
 g_unix_signal_source_new (int signum)
 {
   g_return_val_if_fail (signum == SIGHUP || signum == SIGINT || signum == SIGTERM ||
-                        signum == SIGUSR1 || signum == SIGUSR2, NULL);
+                        signum == SIGUSR1 || signum == SIGUSR2 || signum == SIGWINCH,
+                        NULL);
 
   return _g_main_create_unix_signal_watch (signum);
 }