c++: NRV and ref-extended temps [PR101442]

c++: NRV and ref-extended temps [PR101442]

This issue goes back to r83221, where the cleanup for extended ref temps
changed from being unconditional to being tied to the declaration they
formed part of the initializer for.

The named return value optimization changes the cleanup for the NRV variable
to only run on the EH path; we don't want that change to affect temporary
cleanups.  The perform_member_init change isn't necessary (there 'decl' is a
COMPONENT_REF), it's just for consistency.

	PR c++/101442

gcc/cp/ChangeLog:

	* decl.cc (cp_finish_decl): Don't pass decl to push_cleanup.
	* init.cc (perform_member_init): Likewise.
	* semantics.cc (push_cleanup): Adjust comment.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/initlist-nrv1.C: New test.