[pygobject/wip/mschraal/gdk4-rgba] gdk overrides: Add GDK4 RGBA support

[Marinus Schraal <mschraal src gnome org>]

commit 32f2261f791f93ab48d5098bd43a4da0843e2756
Author: Marinus Schraal <mschraal gnome org>
Date:   Thu Feb 3 17:16:45 2022 +0100

    gdk overrides: Add GDK4 RGBA support

 gi/overrides/Gdk.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gi/overrides/Gdk.py b/gi/overrides/Gdk.py
index 55a6c58c..cd54968d 100644
--- a/gi/overrides/Gdk.py
+++ b/gi/overrides/Gdk.py
@@ -29,6 +29,7 @@ from gi import PyGIDeprecationWarning, require_version
 Gdk = get_introspection_module('Gdk')
 GDK2 = Gdk._version == '2.0'
 GDK3 = Gdk._version == '3.0'
+GDK4 = Gdk._version == '4.0'
 
 __all__ = []
 
@@ -83,7 +84,7 @@ if GDK2 or GDK3:
     Color = override(Color)
     __all__.append('Color')
 
-if GDK3:
+if GDK3 or GDK4:
     # Introduced since Gtk-3.0
     class RGBA(Gdk.RGBA):
         def __init__(self, red=1.0, green=1.0, blue=1.0, alpha=1.0):