gdb/

	gdb/
	* breakpoint.c (watch_command_1): Get a pointer of the lazy
	version of the expression's value, even if reading the value from
	memory fails.  When creating a -location watchpoint, get the
	value's address from the lazy value pointer.

	gdb/testsuite/
	* gdb.base/watchpoint.exp: Test "watch -location" with an
	innacessible location.