[retro-gtk] retro-rumble-effect: Actually register a GType

[Adrien Plazas <aplazas src gnome org>]

commit e9f865f558f393a5184c6e1a7cbf7784ae2965b1
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Jan 6 20:50:46 2020 +0500

    retro-rumble-effect: Actually register a GType

 retro-gtk/retro-rumble-effect.h | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/retro-gtk/retro-rumble-effect.h b/retro-gtk/retro-rumble-effect.h
index 3037769..5991d84 100644
--- a/retro-gtk/retro-rumble-effect.h
+++ b/retro-gtk/retro-rumble-effect.h
@@ -10,6 +10,10 @@
 
 G_BEGIN_DECLS
 
+#define RETRO_TYPE_RUMBLE_EFFECT (retro_rumble_effect_get_type ())
+
+GType retro_rumble_effect_get_type (void) G_GNUC_CONST;
+
 /**
  * RetroRumbleEffect:
  * @RETRO_RUMBLE_EFFECT_STRONG: the strong rumble effect