[gnome-boxes/gnome-3-22] Fix non-matching generic types of inferface implementations

[Zeeshan Ali <zeeshanak src gnome org>]

commit b4ff465fa9741cf704fe59a95dc549f3e560d3fe
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Sep 30 18:45:29 2016 +0200

    Fix non-matching generic types of inferface implementations

 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 77fbb6b..e0036cc 100644
--- a/src/unattended-installer.vala
+++ b/src/unattended-installer.vala
@@ -275,7 +275,7 @@ private class Boxes.UnattendedInstaller: InstallerMedia {
         setup_box.show ();
     }
 
-    public override GLib.List<Pair> get_vm_properties () {
+    public override GLib.List<Pair<string,string>> get_vm_properties () {
         var properties = base.get_vm_properties ();
 
         if (setup_box.express_install) {