sh.c (calc_live_regs): Declare reg as unsigned and modify the for loop expressions...

sh.c (calc_live_regs): Declare reg as unsigned and modify the for loop expressions for it.

	* config/sh/sh.c (calc_live_regs): Declare reg as unsigned and
	modify the for loop expressions for it.  Remove unnecessary casts.
	(sh_expand_prologue): Declare reg as unsigned.
	(sh_gimplify_va_arg_expr): Initinalize lab_over.
	(sh_handle_sp_switch_attribute): Add const qualifier appropriately.

From-SVN: r89901