[perl-Gtk2] Add a FIXME comment about a slight API problem

[Torsten Schönfeld <tsch src gnome org>]

commit 2598682ab0caed8ecefb6d1b81f6bf4bd0595c96
Author: Torsten Schönfeld <kaffeetisch gmx de>
Date:   Sun Aug 10 13:29:13 2014 +0200

    Add a FIXME comment about a slight API problem
    
    The wrapper Gtk2::TreeViewColumn::cell_get_position should not ignore the
    boolean return value.

 xs/GtkTreeViewColumn.xs |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/xs/GtkTreeViewColumn.xs b/xs/GtkTreeViewColumn.xs
index f897b9b..a4f456b 100644
--- a/xs/GtkTreeViewColumn.xs
+++ b/xs/GtkTreeViewColumn.xs
@@ -381,6 +381,7 @@ gtk_tree_view_column_cell_is_visible (tree_column)
 
 #if GTK_CHECK_VERSION(2,2,0)
 
+# FIXME: The boolean return value should not be ignored.
 #### gboolean gtk_tree_view_column_cell_get_position (GtkTreeViewColumn *tree_column, GtkCellRenderer 
*cell_renderer, gint *start_pos, gint *width)
 void
 gtk_tree_view_column_cell_get_position (GtkTreeViewColumn *tree_column, GtkCellRenderer *cell_renderer, 
OUTLIST gint start_pos, OUTLIST gint width)