wasapi: Fix default device handling.

Prior to https://github.com/mozilla/cubeb/pull/682,
a device could be default for all of
MULTIMEDIA, NOTIFICATION, and
VOICE.

After that PR, the first two were
mutually exclusive with the third, I
believe unintentionally.

Restore this behavior so that, e.g.,
on devices with only one output device,
querying for the "voice" device returns
that device.

src/cubeb_wasapi.cpp

@@ -3323,7 +3323,8 @@ wasapi_create_device(cubeb * ctx, cubeb_device_info & ret,
     ret.preferred =
         (cubeb_device_pref)(ret.preferred | CUBEB_DEVICE_PREF_MULTIMEDIA |
                             CUBEB_DEVICE_PREF_NOTIFICATION);
-  } else if (defaults->is_default(flow, eCommunications, device_id.get())) {
+  }
+  if (defaults->is_default(flow, eCommunications, device_id.get())) {
     ret.preferred =
         (cubeb_device_pref)(ret.preferred | CUBEB_DEVICE_PREF_VOICE);
   }