c++: goto entering scope of obj w/ non-trivial dtor [PR103091]

c++: goto entering scope of obj w/ non-trivial dtor [PR103091]

It seems ever since DR 2256 goto is permitted to cross the initialization
of a trivially initialized object with a non-trivial destructor.  We
already supported this as an -fpermissive extension, so this patch just
makes us unconditionally support this.

	DR 2256
	PR c++/103091

gcc/cp/ChangeLog:

	* decl.cc (decl_jump_unsafe): Return bool instead of int.
	Don't consider TYPE_HAS_NONTRIVIAL_DESTRUCTOR.
	(check_previous_goto_1): Simplify now that decl_jump_unsafe
	returns bool instead of int.
	(check_goto): Likewise.

gcc/testsuite/ChangeLog:

	* g++.old-deja/g++.other/init9.C: Don't expect diagnostics for
	goto made valid by DR 2256.
	* g++.dg/init/goto4.C: New test.