[gnome-games] retro-runner: Don't call get_can_access_state() before the game is running

[Alexander Mikhaylenko <alexm src gnome org>]

commit 8690411d045a9745e38e92a705b3eec7ed31865c
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Mar 19 21:53:13 2021 +0500

    retro-runner: Don't call get_can_access_state() before the game is running

 src/retro/retro-runner.vala | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/retro/retro-runner.vala b/src/retro/retro-runner.vala
index 6d8db470..cc909972 100644
--- a/src/retro/retro-runner.vala
+++ b/src/retro/retro-runner.vala
@@ -17,7 +17,7 @@ public class Games.RetroRunner : Object, Runner {
        }
 
        public bool supports_snapshots {
-               get { return core.get_can_access_state (); }
+               get { return started && core.get_can_access_state (); }
        }
 
        public bool is_integrated {
@@ -64,6 +64,7 @@ public class Games.RetroRunner : Object, Runner {
                }
        }
 
+       private bool started;
        private bool core_loaded;
        private bool is_error;
 
@@ -273,6 +274,7 @@ public class Games.RetroRunner : Object, Runner {
                // Unpause an already running game
                core.run ();
                running = true;
+               started = true;
        }
 
        public void pause () {
@@ -347,6 +349,7 @@ public class Games.RetroRunner : Object, Runner {
                }
 
                _running = false;
+               started = false;
                core_loaded = false;
        }