Makefile.in (reg-stack.o): Don't depend on gt-reg-stack.h.

Makefile.in (reg-stack.o): Don't depend on gt-reg-stack.h.

	* Makefile.in (reg-stack.o): Don't depend on gt-reg-stack.h.
	* reg-stack.c (stack_regs_mentioned_data): Change the type to
	VEC(char,heap) *.
	(stack_regs_mentioned): Update the uses of
	stack_regs_mentioned_data.  Don't access the array beyond its
	end.
	(reg_to_stack): Update the uses of stack_regs_mentioned_data.
	Don't include gt-reg-stack.h.

From-SVN: r112060