[gtk+] GtkTreeViewColumn: fix critical warning

[Claudio Saavedra <csaavedra src gnome org>]

commit 7faf5ee765496148eb59cbe3f848f7bcff03bb39
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Tue Feb 4 22:32:02 2014 +0200

    GtkTreeViewColumn: fix critical warning
    
    Do not call _column_autosize() if there is no treeview set yet.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=723637

 gtk/gtktreeviewcolumn.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtktreeviewcolumn.c b/gtk/gtktreeviewcolumn.c
index 29deef0..b08045f 100644
--- a/gtk/gtktreeviewcolumn.c
+++ b/gtk/gtktreeviewcolumn.c
@@ -2273,7 +2273,7 @@ gtk_tree_view_column_set_min_width (GtkTreeViewColumn *tree_column,
   g_object_notify (G_OBJECT (tree_column), "min-width");
   g_object_thaw_notify (G_OBJECT (tree_column));
 
-  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
+  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE && priv->tree_view)
     _gtk_tree_view_column_autosize (GTK_TREE_VIEW (priv->tree_view),
                                    tree_column);
 }
@@ -2337,7 +2337,7 @@ gtk_tree_view_column_set_max_width (GtkTreeViewColumn *tree_column,
   g_object_notify (G_OBJECT (tree_column), "max-width");
   g_object_thaw_notify (G_OBJECT (tree_column));
 
-  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE)
+  if (priv->column_type == GTK_TREE_VIEW_COLUMN_AUTOSIZE && priv->tree_view)
     _gtk_tree_view_column_autosize (GTK_TREE_VIEW (priv->tree_view),
                                    tree_column);
 }