Do not desugar code twice, since this step isn't idempotent.
Do not desugar code twice, since this step isn't idempotent.

	* src/flower/flower.cc: Desugar the parametric AST itself, not its
	result, to avoid re-desugaring the children.

aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi