2005-08-20  Michael Natterer  <mitch@gimp.org>

	* app/base/boundary.c: moved the entire internal state of boundary
	creation and simplification from <eek>global variables</eek> to a
	new "Boundary" struct that needs to be newly allocated for each
	boundary. Yes this allocates and frees memory more often than
	before but the old code was simply one big eek.