d: Fix ICE in build_deref, at d/d-codegen.cc:1650 [PR111650]

	PR d/111650

gcc/d/ChangeLog:

	* decl.cc (get_fndecl_arguments): Move generation of frame type to ...
	(DeclVisitor::visit (FuncDeclaration *)): ... here, after the call to
	build_closure.

gcc/testsuite/ChangeLog:

	* gdc.dg/pr111650.d: New test.