[gimp/gtk3-port] Unkommented settings for preferring a dark GTK+ theme.

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit df71a0d8b2d81de4d90cddbee7050bb624e30acf
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Sat Jul 21 21:17:13 2012 +0400

    Unkommented settings for preferring a dark GTK+ theme.
    
    All things work with two exceptions (so far): the ruler widget and 2nd level dialogs (e.g. PNG saving options) are not affected.

 app/gui/themes.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/app/gui/themes.c b/app/gui/themes.c
index 043e40b..ad18b57 100644
--- a/app/gui/themes.c
+++ b/app/gui/themes.c
@@ -87,11 +87,10 @@ themes_init (Gimp *gimp)
       g_free (path);
     }
 
-#if 0
+
   g_object_set (gtk_settings_get_for_screen (gdk_screen_get_default ()),
                 "gtk-application-prefer-dark-theme", TRUE,
                 NULL);
-#endif
 
   themes_style_provider = GTK_STYLE_PROVIDER (gtk_css_provider_new ());