start-editing signal?

[Allin Cottrell <cottrell wfu edu>]

I'm trying to connect a callback to "start-editing" on a cell 
renderer, but I must be doing something wrong.  My code is
basically

static void create_cell_renderer (gpointer p)
{
    GtkCellRenderer *r;

    r = gtk_cell_renderer_text_new();

    g_object_set(r, "ypad", 1, 
                 "xalign", 1.0, 
                 "mode", GTK_CELL_RENDERER_MODE_EDITABLE,
                 NULL);
    g_signal_connect(r, "start-editing",
                     G_CALLBACK(cell_edit_start), p);
}

When this code is invoked, I'm getting

GLib-GObject-WARNING **: gsignal.c:1669: signal `start-editing' is 
invalid for instance `0x822a5f0'

I've verified that 0x822a5f0 is indeed the return value from
gtk_cell_renderer_text_new.

Can anyone tell me how to make a valid hook-up?  Thanks!

-- 
Allin Cottrell
Department of Economics
Wake Forest University, NC