[gnome-games] retro-runner: Save snapshots only when supported

[Adrien Plazas <aplazas src gnome org>]

commit 9a9cce03dc90951392d9d05fd2c78df2ffcee813
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Apr 30 08:57:30 2016 +0200

    retro-runner: Save snapshots only when supported
    
    Saves the snapshots only if it is supported by the core.
    
    This avoids to change the 'should_save' flag when we can't snpshot the
    game.

 src/retro/retro-runner.vala |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index b04edf1..5e9d8de 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -2,7 +2,7 @@
 
 public class Games.RetroRunner : Object, Runner {
        public bool can_quit_safely {
-               get { return core_supports_snapshotting || !should_save; }
+               get { return !should_save; }
        }
 
        public bool can_resume {
@@ -241,6 +241,10 @@ public class Games.RetroRunner : Object, Runner {
                        return;
 
                save_ram ();
+
+               if (!core_supports_snapshotting)
+                       return;
+
                save_snapshot ();
                save_screenshot ();