[gtk/bilelmoussaoui/trick-gir-list-position] gtk: trick g-ir scanner to add INVALID_LIST_POSITION

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 574f713ba01ad1379ed78716d3cc2654a8fe044b
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Tue May 4 21:33:41 2021 +0000

    gtk: trick g-ir scanner to add INVALID_LIST_POSITION
    
    without it, the define doesn't get picked in the introspection data

 gtk/gtktypes.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtktypes.h b/gtk/gtktypes.h
index 9b3b76390e..2d8546945c 100644
--- a/gtk/gtktypes.h
+++ b/gtk/gtktypes.h
@@ -57,7 +57,7 @@ typedef struct _GtkWidget              GtkWidget;
 typedef struct _GtkWindow              GtkWindow;
 
 /**
- * GTK_INVALID_LIST_POSITION:
+ * GTK_INVALID_LIST_POSITION: (value 4294967295)
  *
  * The value used to refer to a guaranteed invalid position in a #GListModel. This
  * value may be returned from some functions, others may accept it as input.