[gnome-boxes] vm-configurator: Use ICH9 when q35 machine type is supported

[Felipe Borges <felipeborges src gnome org>]

commit 22089787055342b2a310955288556ef395a121c9
Author: Fabiano Fidêncio <fidencio redhat com>
Date:   Fri Oct 12 09:24:55 2018 +0200

    vm-configurator: Use ICH9 when q35 machine type is supported
    
    Related: https://bugzilla.redhat.com/show_bug.cgi?id=1581422
    
    Signed-off-by: Fabiano Fidêncio <fidencio redhat com>

 src/vm-configurator.vala | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)
---
diff --git a/src/vm-configurator.vala b/src/vm-configurator.vala
index b97ce820..bf41f03c 100644
--- a/src/vm-configurator.vala
+++ b/src/vm-configurator.vala
@@ -368,13 +368,22 @@ private static void set_video_config (Domain domain, InstallerMedia install_medi
         domain.add_device (video);
     }
 
-    private static void set_sound_config (Domain domain, InstallerMedia install_media) {
-        var sound = new DomainSound ();
+    private static DomainSoundModel get_sound_model (InstallerMedia install_media) {
+        if (install_media.prefers_ich9)
+            return (DomainSoundModel) DomainSoundModel.ICH9;
+
         var device = find_device_by_prop (install_media.supported_devices, DEVICE_PROP_CLASS, "audio");
-        var model = (device != null)? get_enum_value (device.get_name (), typeof (DomainSoundModel)) :
-                                      DomainSoundModel.ICH6;
+        if (device == null)
+            return (DomainSoundModel) DomainSoundModel.ICH6;
+
+        var model = get_enum_value (device.get_name (), typeof (DomainSoundModel));
         return_if_fail (model != -1);
-        sound.set_model ((DomainSoundModel) model);
+        return (DomainSoundModel) model;
+    }
+
+    private static void set_sound_config (Domain domain, InstallerMedia install_media) {
+        var sound = new DomainSound ();
+        sound.set_model (get_sound_model (install_media));
 
         domain.add_device (sound);
     }