[gtk+] gtktextattributes: explain what is "pg_bg"

[Sébastien Wilmet <swilmet src gnome org>]

commit 6f990fa7e4d7660d49650307f97e8690f962381c
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Mar 31 19:08:49 2013 +0200

    gtktextattributes: explain what is "pg_bg"
    
    I didn't know what "pg" stands for.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=697048

 gtk/gtktextattributes.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktextattributes.h b/gtk/gtktextattributes.h
index 521ac00..760aa24 100644
--- a/gtk/gtktextattributes.h
+++ b/gtk/gtktextattributes.h
@@ -144,6 +144,7 @@ struct _GtkTextAttributes
   PangoLanguage *language;
 
   /*< private >*/
+  /* Paragraph background */
   GdkColor *pg_bg_color;
 
   /*< public >*/
@@ -159,6 +160,7 @@ struct _GtkTextAttributes
   guint editable : 1;
 
   /*< private >*/
+  /* Paragraph background */
   GdkRGBA *pg_bg_rgba;
 
   guint padding[3];