re PR c++/10506 (ICE in build_new at cp/init.c with -fkeep-inline-functions and multiple inheritance)

	PR c++/10506
	* method.c (use_thunk): Decrement immediate_size_expand.

	PR c++/10503
	* cp-tree.h (DECL_VAR_MARKED_P): New macro.
	(DECL_MAYBE_TEMPLATE): Remove.
	* class.c (fixed_type_or_null): Avoid infinite recursion.

	PR c++/10506
	* g++.dg/init/new6.C: New test.

	PR c++/10503
	* g++.dg/init/ref6.C: New test.

From-SVN: r66150