[gnome-boxes] media-manager: Fix non-flatpak build issue for GUdev codepath

[Felipe Borges <felipeborges src gnome org>]

commit 8fdbb80a5ce0e59bacc0cb01dfccf545559fada0
Author: Felipe Borges <felipeborges gnome org>
Date:   Fri Dec 17 13:22:30 2021 +0100

    media-manager: Fix non-flatpak build issue for GUdev codepath

 src/media-manager.vala | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/media-manager.vala b/src/media-manager.vala
index ed92716b..692a6870 100644
--- a/src/media-manager.vala
+++ b/src/media-manager.vala
@@ -138,10 +138,11 @@ else if (VMConfigurator.is_libvirt_cloning_config (config))
     }
 
 #if !FLATPAK
-    private async GLib.List<InstallerMedia> load_physical_medias ()
-        var list = GLib.List<InstallerMedia> list ();
+    public GUdev.Client client;
+    private async GLib.List<InstallerMedia> load_physical_medias () {
+        var list = new GLib.List<InstallerMedia> ();
 
-        GUdev.Client client = new GUdev.Client ({"block"});
+        client = new GUdev.Client ({"block"});
         var enumerator = new GUdev.Enumerator (client);
         // We don't want to deal with partitions to avoid duplicate medias
         enumerator.add_match_property ("DEVTYPE", "disk");