[gnome-boxes] express: Correct a check

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 38c6b911dfc6bcb0975b84ea2da8e1c7837dd6cf
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Jan 24 23:18:17 2012 +0200

    express: Correct a check
    
    We were passing the unattended disk path to created domains even when
    unattended installation was being disabled and disk image wasn't being
    copied/created so unattended installs were ending-up with this fatal
    error:
    
    qemu-kvm: -drive file=/home/user/.cache/gnome-boxes/fedora14-unattended.img,if=none,id=drive-scsi0-0-1,format=raw: could not open disk image /home/user/.cache/gnome-boxes/fedora14-unattended.img: No such file or directory

 src/unattended-installer.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/unattended-installer.vala b/src/unattended-installer.vala
index 26732d3..55f0010 100644
--- a/src/unattended-installer.vala
+++ b/src/unattended-installer.vala
@@ -123,7 +123,7 @@ private abstract class Boxes.UnattendedInstaller: InstallerMedia {
     public virtual void set_direct_boot_params (DomainOs os) {}
 
     public virtual DomainDisk? get_unattended_disk_config () {
-        if (disk_path == null)
+        if (!express_toggle.active)
             return null;
 
         var disk = new DomainDisk ();