[gimp] app: OS X specific "About" menu label

[Michael Natterer <mitch src gnome org>]

commit 98dddc3866bfa2e5c2bed62245b98c93c650ea8a
Author: Michael Natterer <mitch gimp org>
Date:   Wed Sep 17 12:22:25 2014 +0200

    app: OS X specific "About" menu label
    
    Manally picked that change from commit 7a75d4df from gimp-2-8.

 app/actions/dialogs-actions.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/app/actions/dialogs-actions.c b/app/actions/dialogs-actions.c
index 88a4555..81ad39f 100644
--- a/app/actions/dialogs-actions.c
+++ b/app/actions/dialogs-actions.c
@@ -259,11 +259,13 @@ static const GimpStringActionEntry dialogs_toplevel_actions[] =
     GIMP_HELP_TIPS_DIALOG },
 
   { "dialogs-about", "help-about",
-#if defined(G_OS_WIN32) || defined(PLATFORM_OSX)
+#if defined(G_OS_WIN32)
     NC_("dialogs-action", "About GIMP"),
+#elif defined(PLATFORM_OSX)
+    NC_("dialogs-action", "About"),
 #else /* UNIX: use GNOME HIG */
     NC_("dialogs-action", "_About"),
-#endif /* G_OS_WIN32 */
+#endif
     NULL,
     NC_("dialogs-action", "About GIMP"),
     "gimp-about-dialog",