2008-03-13  Murray Cumming  <murrayc@murrayc.com>

Bug 521992 – Pressing Escape on Initial dialog does not close 
application properly.
(Pavel Mlčoch)

* glom/dialog_database_preferences.cc load_from_document():
Do not crash if the Gda::DataModel is empty.

* glom/application.cc ui_file_select_save(), on_document_load(),
  offer_new_or_existing():
* glom/frame_glom.cc on_menu_file_export():
* glom/utility_widgets/imageglom.cc
  on_menupopup_activate_select_file(): Check for 
Gtk::RESPONSE_DELETE_EVENT instead of just Gtk::RESPONSE_CANCEL, so 
that we treat pressing Escape the same as pressing Cancel. When we 
just ignore this then we can leave the application in an unexpected 
state.

svn path=/trunk/; revision=1456