[retro-gtk] options: Cast the return of retro_option_get_values()

[Adrien Plazas <aplazas src gnome org>]

commit b641a0d84d28c835e77c41c781c294c8e29dce2c
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed Sep 20 13:32:40 2017 +0200

    options: Cast the return of retro_option_get_values()
    
    The avoids a compile time warning.

 retro-gtk/retro-option.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/retro-gtk/retro-option.c b/retro-gtk/retro-option.c
index 2368293..e56f6ce 100644
--- a/retro-gtk/retro-option.c
+++ b/retro-gtk/retro-option.c
@@ -78,7 +78,7 @@ retro_option_get_values (RetroOption *self)
 {
   g_return_val_if_fail (RETRO_IS_OPTION (self), NULL);
 
-  return self->values;
+  return (const gchar **) self->values;
 }
 
 const gchar *