[gnome-games] mame: Yield on MameGameUriAdapter.game_for_uri()

[Adrien Plazas <aplazas src gnome org>]

commit bafa1b7c90130ea0ea4d8d74aba95df03226ce07
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu Apr 13 15:34:50 2017 +0200

    mame: Yield on MameGameUriAdapter.game_for_uri()
    
    Yields before returning a new game. This is a safe default as the method
    is async and hence is expected to yield at some point.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781334

 plugins/mame/src/mame-game-uri-adapter.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/plugins/mame/src/mame-game-uri-adapter.vala b/plugins/mame/src/mame-game-uri-adapter.vala
index beea624..ee18949 100644
--- a/plugins/mame/src/mame-game-uri-adapter.vala
+++ b/plugins/mame/src/mame-game-uri-adapter.vala
@@ -29,6 +29,9 @@ private class Games.MameGameUriAdapter : GameUriAdapter, Object {
                var core_source = new RetroCoreSource (PLATFORM, { SEARCHED_MIME_TYPE, SPECIFIC_MIME_TYPE });
                var runner = new RetroRunner (core_source, uri, uid, title);
 
+               Idle.add (this.game_for_uri.callback);
+               yield;
+
                return new GenericGame (title, icon, cover, runner);
        }
 }