[gnome-settings-daemon] power: Fix a small memory leak

[Bastien Nocera <hadess src gnome org>]

commit a9e92f08c8e47d1e547708f20f81714d80688295
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Jan 27 23:16:26 2015 +0100

    power: Fix a small memory leak
    
    Don't forget to unref the left-over variant.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=743456

 plugins/power/gpm-common.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/power/gpm-common.c b/plugins/power/gpm-common.c
index 3cca737..c0cc1bc 100644
--- a/plugins/power/gpm-common.c
+++ b/plugins/power/gpm-common.c
@@ -183,6 +183,7 @@ gsd_power_is_hardware_a_vm (void)
         str = g_variant_get_string (inner, NULL);
         if (str != NULL && str[0] != '\0')
                 ret = TRUE;
+        g_variant_unref (inner);
 out:
         if (connection != NULL)
                 g_object_unref (connection);