[gtkada] GtkAda 2.4.0 and plots

[Manuel Op de Coul]

First of all thanks very much for the new GtkAda version.

There's a problem I got with the gtkextra plots in my program,
which doesn't occur when it's compiled with GtkAda 2.2.
I checked my code and compared it with the testgtk code, but I
couldn't find a reason why this happens. Also the GtkAda code
for gtkextra hasn't changed much since the last version.
Perhaps someone has an idea? It looks like something in the
gtkextra part hasn't been initialised yet.

GNU gdb 5.0.gnat.3.15p
This GDB was configured as "i686-pc-cygwin"...
Program received signal SIGSEGV, Segmentation fault.
0x3e44ac in type_check_is_value_type_U ()
(gdb) bt
#0  0x3e44ac in type_check_is_value_type_U ()
#1  0x3e35eb in g_type_check_is_value_type ()
#2  0x3d3f1f in g_signal_newv ()
#3  0x1475718 in gtk_signal_newv ()
#4  0x1475798 in gtk_signal_new ()
#5  0x9d3113 in gtk_plot_canvas_class_init ()
#6  0x3df1a2 in type_class_init_Wm ()
#7  0x3e0be6 in g_type_class_ref ()
#8  0x3c7294 in g_object_newv ()
#9  0x3c78a3 in g_object_new_valist ()
#10 0x3c6ffe in g_object_new ()
#11 0x1531c31 in gtk_type_new ()
#12 0x9d3611 in gtk_plot_canvas_new ()
#13 0x44e74d in gtk__extra__plot_canvas__initialize ()
#14 0x44e720 in gtk__extra__plot_canvas__gtk_new ()
#15 0x76c748 in ir_plot_dialog_pkg__initialize ()

Thanks, and best wishes for next year.

Manuel