Graphics: addition of "beingdeleted" property

[John W. Eaton]

On 18-Jan-2008, Michael Goffioul wrote:

| src/ChangeLog:
| 
| 2008-18-01  Michael Goffioul <address@hidden>
| 
|     * graphics.h.in (base_properties::beingdeleted,
|     base_properties::is_beingdeleted, base_properties::get_beingdeleted,
|     base_properties::set_beingdeleted): Add beingdeleted property and
|     accessors.
|     * graphics.cc (base_properties::get): Likewise.
|     (gh_manager::free): Set beingdeleted to "on" when freeing an object.
|     * genprops.awk: Skip C++-style comments in property declaration

I applied this patch and checked it in.

Thanks,

jwe