[gnome-games] retro-runner: Add should_save

[Adrien Plazas <aplazas src gnome org>]

commit 889f035d0737be5d9c5847f2f3a6de7ea83b5805
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun Mar 6 19:25:03 2016 +0100

    retro-runner: Add should_save
    
    This avoids useless saves and it will be used to know if we can safely
    quit the game.

 src/retro/retro-runner.vala |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index fcbb414..ee9f559 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -42,6 +42,9 @@ public class Games.RetroRunner : Object, Runner {
                set {
                        _running = value;
 
+                       if (running)
+                               should_save = true;
+
                        video.sensitive = running;
                }
                get { return _running; }
@@ -49,6 +52,7 @@ public class Games.RetroRunner : Object, Runner {
 
        private bool is_initialized;
        private bool is_ready;
+       private bool should_save;
 
        public RetroRunner (string module_basename, string uri, Uid uid) {
                is_initialized = false;
@@ -224,9 +228,14 @@ public class Games.RetroRunner : Object, Runner {
        }
 
        private void save () throws Error {
+               if (!should_save)
+                       return;
+
                save_ram ();
                save_snapshot ();
                save_screenshot ();
+
+               should_save = false;
        }
 
        private string get_save_path () throws Error {