2006-05-09  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpimage.c (gimp_image_new)
	* app/core/gimpitem.c (gimp_item_configure)
	* app/display/gimpdisplay.c (gimp_display_new): make sure IDs wrap
	correctly at G_MAXINT and skip IDs which are currently in use.

	It makes no sense to treat gimp->image_table and gimp->images
	differently, since they keep the same set of images. And it makes
	no sense to treat gimp->displays and gimp->images differently.
	Moved all container adding into the objects' constructors:

	* app/core/gimp.c (gimp_create_image): don't add the new image
	to gimp->images here...

	* app/core/gimpimage.c (gimp_image_constructor): ...but here.

	* app/core/gimp-gui.c (gimp_create_display): don't add the new
	display to gimp->displays here...

	* app/display/gimpdisplay.c (gimp_display_new): ...but here.