[ethereal-dev] GTK 1.2.1 bug/feature means "gtk_tree_set_view_mode()" has no effect

[guy@xxxxxxxxxx (Guy Harris)]

When I build "ethereal" on a machine here with GTK 1.2.1 installed, it
drew lines in the tree view in the detail window; it appears that
there's a bug in GTK 1.2.1, wherein "gtk_tree_set_view_mode()" has no
effect on the way tree views are drawn, the GTK+ 1.2[.x] tutorial
nonwithstanding.  GTK 1.0.6, at least, doesn't have this problem.

I sent this patch - which appears to fix the problem - to
"gtk-devel-list@xxxxxxxxxx", asking if this really *is* a bug, or a
feature:

*** gtktreeitem.c.dist	Wed Feb 24 02:15:13 1999
--- gtktreeitem.c	Tue Apr  6 00:35:36 1999
***************
*** 586,591 ****
--- 586,593 ----
  
    item = GTK_TREE_ITEM(widget);
    tree = GTK_TREE(widget->parent);
+   if (!tree->view_line)
+     return;
  
    /* draw vertical line */
    lx1 = item->pixmaps_box->allocation.width;