[libgovirt] Don't leak old OvirtCdrom::file value when setting it

[Christophe Fergeau <teuf src gnome org>]

commit ff4e9aefaaeece7fc5aaffb08bcc6348c3ac15df
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Wed Apr 16 18:18:30 2014 +0200

    Don't leak old OvirtCdrom::file value when setting it
    
    Leak reported by valgrind

 govirt/ovirt-cdrom.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/govirt/ovirt-cdrom.c b/govirt/ovirt-cdrom.c
index 31ded13..16ee833 100644
--- a/govirt/ovirt-cdrom.c
+++ b/govirt/ovirt-cdrom.c
@@ -70,6 +70,7 @@ static void ovirt_cdrom_set_property(GObject *object,
 
     switch (prop_id) {
     case PROP_FILE:
+        g_free(cdrom->priv->file);
         cdrom->priv->file = g_value_dup_string(value);
         break;
     default: