[gtk: 1/2] Fix annotation for gtk_tree_view_is_blank_at_pos()

[Christoph Reiter <creiter src gnome org>]

commit c5bece5cef4b1a6c4569e6131747ce70925cb469
Author: Gniourf <gniourfgniourf gmail com>
Date:   Wed Feb 14 13:51:00 2018 +0100

    Fix annotation for gtk_tree_view_is_blank_at_pos()
    
    The annotation (allow-none) is wrong. Since
    gtk_tree_view_is_blank_at_pos() also calls
    gtk_tree_view_get_path_at_pos(), the same fields should have the same
    annotations.

 gtk/gtktreeview.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index d7bed5d2b9..1670f1a0c8 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -13346,10 +13346,14 @@ gtk_tree_view_get_visible_range (GtkTreeView  *tree_view,
  * @tree_view: A #GtkTreeView
  * @x: The x position to be identified (relative to bin_window)
  * @y: The y position to be identified (relative to bin_window)
- * @path: (out) (allow-none): A pointer to a #GtkTreePath pointer to be filled in, or %NULL
- * @column: (out) (allow-none): A pointer to a #GtkTreeViewColumn pointer to be filled in, or %NULL
- * @cell_x: (out) (allow-none): A pointer where the X coordinate relative to the cell can be placed, or %NULL
- * @cell_y: (out) (allow-none): A pointer where the Y coordinate relative to the cell can be placed, or %NULL
+ * @path: (out) (optional) (nullable): A pointer to a #GtkTreePath pointer to
+ *   be filled in, or %NULL
+ * @column: (out) (transfer none) (optional) (nullable): A pointer to a
+ *   #GtkTreeViewColumn pointer to be filled in, or %NULL
+ * @cell_x: (out) (optional): A pointer where the X coordinate relative to the
+ *   cell can be placed, or %NULL
+ * @cell_y: (out) (optional): A pointer where the Y coordinate relative to the
+ *   cell can be placed, or %NULL
  *
  * Determine whether the point (@x, @y) in @tree_view is blank, that is no
  * cell content nor an expander arrow is drawn at the location. If so, the