[retro-gtk] retro-core: Remove return result from shutdown signal

[Adrien Plazas <aplazas src gnome org>]

commit 67ec368c4b731b9463effc66da98b819d85197ff
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Mon Jan 6 19:06:08 2020 +0500

    retro-core: Remove return result from shutdown signal
    
    Same as the previous commit. This will be done async later, so always
    assume TRUE.

 retro-gtk/retro-core.c        | 4 +---
 retro-gtk/retro-environment.c | 5 ++---
 2 files changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/retro-gtk/retro-core.c b/retro-gtk/retro-core.c
index e49d917..d2ce107 100644
--- a/retro-gtk/retro-core.c
+++ b/retro-gtk/retro-core.c
@@ -503,14 +503,12 @@ retro_core_class_init (RetroCoreClass *klass)
    * The ::shutdown signal is emitted when the core shut down.
    *
    * The core must be released or re-started in order to function anew.
-   *
-   * Returns: whether the request got fulfilled
    */
   signals[SIG_SHUTDOWN_SIGNAL] =
     g_signal_new ("shutdown", RETRO_TYPE_CORE, G_SIGNAL_RUN_LAST,
                   0, NULL, NULL,
                   NULL,
-                  G_TYPE_BOOLEAN,
+                  G_TYPE_NONE,
                   0);
 
   /**
diff --git a/retro-gtk/retro-environment.c b/retro-gtk/retro-environment.c
index 0791563..64c8c94 100644
--- a/retro-gtk/retro-environment.c
+++ b/retro-gtk/retro-environment.c
@@ -424,10 +424,9 @@ set_variables (RetroCore     *self,
 static gboolean
 shutdown (RetroCore *self)
 {
-  gboolean result = FALSE;
-  g_signal_emit_by_name (self, "shutdown", &result);
+  g_signal_emit_by_name (self, "shutdown");
 
-  return result;
+  return TRUE;
 }
 
 static gboolean