reg-stack.c (struct block_info_def): Correct grammar typo.

reg-stack.c (struct block_info_def): Correct grammar typo.

	* reg-stack.c (struct block_info_def): Correct grammar typo.
	(compensate_edge): Clean-up.  Perform as little work as possible
	when src and dest stacks match.  Avoid modifying block_info.
	Reorder and simplify assertion checks.  Avoid unnecessary copying
	of regstack structure.
	(convert_regs_1): Set the done flag here...
	(convert_regs_2): ... instead of here.

From-SVN: r100602