for: a loop we don't enter in should cost 0 cycles.
for: a loop we don't enter in should cost 0 cycles.

	* src/parser/ast-factory.cc (ast_for): Use | for the
	initialization.  This way, the for loop "costs" exactly one cycle
	per iteration.

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