[gtk+] Minor documentation edit

[Matthias Clasen <matthiasc src gnome org>]

commit 807f0aa74795816e59088838343c7557b921fa62
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 12 22:58:47 2014 -0400

    Minor documentation edit

 gtk/gtkmain.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index 0b187d5..16a0712 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -1020,6 +1020,10 @@ gtk_init_check (int    *argc,
  * the option group returned by gtk_get_option_group(),
  * you don’t have to call gtk_init().
  *
+ * And if you are using #GtkApplication, you don't have to call any of the
+ * initialization functions either; the #GtkApplication::startup handler
+ * does it for you.
+ *
  * This function will terminate your program if it was unable to
  * initialize the windowing system for some reason. If you want
  * your program to fall back to a textual interface you want to