[retro-gtk] core-view: Make an ownership handling clearer

[Adrien Plazas <aplazas src gnome org>]

commit 1dfb4c01953b2f0676551901276d3b6f1b620ab9
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Apr 17 00:11:33 2021 +0200

    core-view: Make an ownership handling clearer

 retro-gtk/retro-core-view.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/retro-gtk/retro-core-view.c b/retro-gtk/retro-core-view.c
index 678220b..dc4e6ae 100644
--- a/retro-gtk/retro-core-view.c
+++ b/retro-gtk/retro-core-view.c
@@ -596,10 +596,8 @@ retro_core_view_set_key_joypad_mapping (RetroCoreView         *self,
   g_return_if_fail (RETRO_IS_CORE_VIEW (self));
   g_return_if_fail (mapping == NULL || RETRO_IS_KEY_JOYPAD_MAPPING (mapping));
 
-  g_object_unref (self->key_joypad_mapping);
-  if (mapping != NULL)
-    self->key_joypad_mapping = g_object_ref (mapping);
-  else
+  g_set_object (&self->key_joypad_mapping, mapping);
+  if (self->key_joypad_mapping == NULL)
     self->key_joypad_mapping = retro_key_joypad_mapping_new ();
 }