[gimp] app: add the new display format features to gimpconfig-dump.c

[Michael Natterer <mitch src gnome org>]

commit 8a5966ac7b5889d088dd7eaa5932eef9c76891c1
Author: Michael Natterer <mitch gimp org>
Date:   Mon Apr 21 16:30:50 2014 +0200

    app: add the new display format features to gimpconfig-dump.c
    
    so they end up in the gimprc manual page.

 app/config/gimpconfig-dump.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/app/config/gimpconfig-dump.c b/app/config/gimpconfig-dump.c
index cd639de..1de6330 100644
--- a/app/config/gimpconfig-dump.c
+++ b/app/config/gimpconfig-dump.c
@@ -317,7 +317,11 @@ static const gchar display_format_description[] =
 "%H  image height in real-world units\n"
 "%M  the image size expressed in megapixels\n"
 "%u  unit symbol\n"
-"%U  unit abbreviation\n\n";
+"%U  unit abbreviation\n"
+"%x  the width of the active layer/channel in pixels\n"
+"%X  the width of the active layer/channel in real-world units\n"
+"%y  the height of the active layer/channel in pixels\n"
+"%Y  the height of the active layer/channel in real-world units\n\n";
 
 
 static gchar *