[libadwaita] animation-target: Add G_GNUC_WARN_UNUSED_RESULT to _new()

[Alexander Mikhaylenko <alexm src gnome org>]

commit 7103d57360fb65e7a47587c6eb089203a1dffe18
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Nov 22 18:18:26 2021 +0500

    animation-target: Add G_GNUC_WARN_UNUSED_RESULT to _new()

 src/adw-animation-target.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/adw-animation-target.h b/src/adw-animation-target.h
index 6a579530..42483d04 100644
--- a/src/adw-animation-target.h
+++ b/src/adw-animation-target.h
@@ -42,6 +42,6 @@ GDK_DECLARE_INTERNAL_TYPE (AdwCallbackAnimationTarget, adw_callback_animation_ta
 ADW_AVAILABLE_IN_ALL
 AdwAnimationTarget *adw_callback_animation_target_new (AdwAnimationTargetFunc callback,
                                                        gpointer               user_data,
-                                                       GDestroyNotify         destroy);
+                                                       GDestroyNotify         destroy) 
G_GNUC_WARN_UNUSED_RESULT;
 
 G_END_DECLS