* breakpoint.h (bpstat): New field print_it.

	* breakpoint.h (bpstat): New field print_it.
	breakpoint.c (bpstat_print): Use it.
	(print_it_normal): New function (from old bpstat_print code).
	(bpstat_{alloc,stop_status}): Set print_it field.

	* breakpoint.c (bpstat_stop_status): Use catch_errors when
	evaluating watchpoint condition, via new function watchpoint_check.
	Also stop if watchpoint disabled due to leaving its block.