[gnome-settings-daemon] media-keys: Fix possible crashers and memory leaks

[Bastien Nocera <hadess src gnome org>]

commit 6ef071c95d32fb444a2110eccfc4551d8a1b5522
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Feb 22 14:07:55 2016 +0100

    media-keys: Fix possible crashers and memory leaks
    
    When setting (or trying to set) headset ports, by updating
    libgnome-volume-control.

 plugins/media-keys/gvc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/media-keys/gvc b/plugins/media-keys/gvc
index 3af2560..0a50079 160000
--- a/plugins/media-keys/gvc
+++ b/plugins/media-keys/gvc
@@ -1 +1 @@
-Subproject commit 3af25601db68387e7818f87c2c3144ea4431c14a
+Subproject commit 0a500795bde6254e14eda9be03904b7015a84146