adapted basegfx to be smarter in some areas

(cherry picked from commit 888e6450)

Conflicts:
	basegfx/inc/basegfx/pixel/bpixel.hxx
	basegfx/inc/basegfx/point/b2dhompoint.hxx
	basegfx/inc/basegfx/point/b3dhompoint.hxx
	basegfx/inc/basegfx/raster/rasterconvert3d.hxx
	basegfx/inc/basegfx/tuple/b2dtuple.hxx
	basegfx/inc/basegfx/tuple/b2i64tuple.hxx
	basegfx/inc/basegfx/tuple/b2ituple.hxx
	basegfx/inc/basegfx/tuple/b3dtuple.hxx
	basegfx/inc/basegfx/tuple/b3i64tuple.hxx
	basegfx/inc/basegfx/tuple/b3ituple.hxx
	basegfx/source/point/b2dhompoint.cxx
	basegfx/source/tuple/b2ituple.cxx

Change-Id: Id92864093dd40d34bd20b130cc3b405a7b8f9d91