[gtkmm] Gdk::RGBA: Add is_clear() and is_opaque()

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 256a73793e8280437ba52dffcca4dd2c089b5d12
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Nov 28 15:05:02 2017 +0100

    Gdk::RGBA: Add is_clear() and is_opaque()

 gdk/src/rgba.hg |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gdk/src/rgba.hg b/gdk/src/rgba.hg
index b236734..1668e48 100644
--- a/gdk/src/rgba.hg
+++ b/gdk/src/rgba.hg
@@ -197,6 +197,9 @@ public:
 
   _WRAP_METHOD(Glib::ustring to_string() const, gdk_rgba_to_string)
 
+  _WRAP_METHOD(bool is_clear() const, gdk_rgba_is_clear)
+  _WRAP_METHOD(bool is_opaque() const, gdk_rgba_is_opaque)
+
 #m4begin
   _WRAP_EQUAL(gdk_rgba_equal)
 #m4end