audio/dbus: fix building

Commit c9c847481 broken dbus audio module compilation with bad
'CONFIG_GIO' usage. Furthermore, it implied extra dependency on audio
module which aren't necessary.

The problem was that 'dbus_display' is not correctly automatically set
on MacOS, because opengl dependency wasn't taken into account.

Fixes: c9c847481 ("audio/dbus: Fix building with modules on macOS")
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220622154918.560870-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

audio/meson.build

@@ -28,7 +28,7 @@ endforeach
 
 if dbus_display
     module_ss = ss.source_set()
-    module_ss.add(when: [gio, pixman, opengl, 'CONFIG_GIO'], if_true: files('dbusaudio.c'))
+    module_ss.add(when: gio, if_true: files('dbusaudio.c'))
     audio_modules += {'dbus': module_ss}
 endif
 

meson.build

@@ -1672,6 +1672,8 @@ dbus_display = get_option('dbus_display') \
            error_message: '-display dbus requires --enable-modules') \
   .require(gdbus_codegen.found(),
            error_message: '-display dbus requires gdbus-codegen') \
+  .require(opengl.found(),
+           error_message: '-display dbus requires epoxy/egl') \
   .allowed()
 
 have_virtfs = get_option('virtfs') \