[gtksourceview] gutterrenderer: add docs for change_buffer

[Ignacio Casal Quinteiro <icq src gnome org>]

commit eb4d593169e270c08813ed686ffeb919a5033db2
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Thu Aug 27 08:28:30 2015 +0200

    gutterrenderer: add docs for change_buffer

 gtksourceview/gtksourcegutterrenderer.h |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/gtksourceview/gtksourcegutterrenderer.h b/gtksourceview/gtksourcegutterrenderer.h
index 98302a3..09e61de 100644
--- a/gtksourceview/gtksourcegutterrenderer.h
+++ b/gtksourceview/gtksourcegutterrenderer.h
@@ -103,7 +103,7 @@ struct _GtkSourceGutterRendererClass
        void (*end)                 (GtkSourceGutterRenderer      *renderer);
 
        /**
-        * GtkSourceGutterRendererClass::change_view
+        * GtkSourceGutterRendererClass::change_view:
         * @renderer: a #GtkSourceGutterRenderer.
         * @old_view: (allow-none): the old #GtkTextView.
         *
@@ -112,6 +112,13 @@ struct _GtkSourceGutterRendererClass
        void (*change_view)         (GtkSourceGutterRenderer      *renderer,
                                     GtkTextView                  *old_view);
 
+       /**
+        * GtkSourceGutterRendererClass::change_buffer:
+        * @renderer: a #GtkSourceGutterRenderer.
+        * @old_buffer: (allow-none): the old #GtkTextBuffer.
+        *
+        * This is called when the text buffer changes for @renderer.
+        */
        void (*change_buffer)       (GtkSourceGutterRenderer      *renderer,
                                     GtkTextBuffer                *old_buffer);