[libgnome-volume-control/gbsneto/change-system-sounds-icon] mixer-control: Use the "emblem-system-symbolic" icon

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 468022b708fc1a56154f3b0cc5af3b938fb3e9fb
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Jun 14 15:02:17 2019 -0300

    mixer-control: Use the "emblem-system-symbolic" icon
    
    As suggested by the last round of design review [1], use the
    "emblem-system-symbolic" icon with system sounds.
    
    [1] https://gitlab.gnome.org/GNOME/gnome-control-center/issues/548

 gvc-mixer-control.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gvc-mixer-control.c b/gvc-mixer-control.c
index f16829d..c611a41 100644
--- a/gvc-mixer-control.c
+++ b/gvc-mixer-control.c
@@ -2748,7 +2748,7 @@ update_event_role_stream (GvcMixerControl                  *control,
         max_volume = pa_cvolume_max (&info->volume);
 
         gvc_mixer_stream_set_name (stream, _("System Sounds"));
-        gvc_mixer_stream_set_icon_name (stream, "multimedia-volume-control");
+        gvc_mixer_stream_set_icon_name (stream, "emblem-system-symbolic");
         gvc_mixer_stream_set_volume (stream, (guint)max_volume);
         gvc_mixer_stream_set_is_muted (stream, info->mute);