[project @ 2001-08-22 10:00:51 by simonpj]

[project @ 2001-08-22 10:00:51 by simonpj]
-------------------------
	Fix a demand-analyser bug
	-------------------------

This bug led to "entered absent arg" errors.
The fix is in DmdAnal.dmdTransform

	-- Important!  If we Keep the constructor application, then
	-- we need the demands the constructor places (usually lazy)
	-- If not, we don't need to.  For example:
	--	f p@(x,y) = (p,y)	-- S(AL)
	--	g a b     = f (a,b)
	-- It's vital that we don't calculate Absent for a!