gtk_clist_columns_autosize

[u07ih abdn ac uk]

Hi.
I'm using gtk_clist_columns_autosize on a CTree, with the tree +/- in the first
column. This worked fine with Version 1.2.6, but is currently crashing with

Program received signal SIGSEGV, Segmentation fault.
0x2acd0d41 in gdk_string_width (font=0x807e210, string=0x0) at gdkfont.c:236
236	gdkfont.c: No such file or directory.
(gdb) bt
#0  0x2acd0d41 in gdk_string_width (font=0x807e210, string=0x0)
    at gdkfont.c:236
#1  0x2ac23195 in cell_size_request (clist=0x8092ab0, clist_row=0x8093fe0, 
    column=0, requisition=0x7ffff7f0) at gtkctree.c:2847
#2  0x2ac0c609 in gtk_clist_optimal_column_width (clist=0x8092ab0, column=0)
    at gtkclist.c:1711
#3  0x2ac0c55d in gtk_clist_columns_autosize (clist=0x8092ab0)
    at gtkclist.c:1676
#4  0x804a684 in gui_pack_ctree () at gui.c:130
#5  0x804aaef in gum_gui_init () at gui.c:194
#6  0x804a222 in main (argc=1, argv=0x7ffff974) at gum.c:86

It works fine if I do a 
for (i = 1; i < 6; i++)
	gtk_clist_set_column_auto_resize (...);
instead, but just the first column isn't any size.

Is this an ex-bug that I should do some #ifdef's to check for >= 1.2.6 or <
1.2.6 or should I be doing something different?

iain