re PR c++/15097 (code generator problem with ::delete and multiple inheritance and virtual deconstructs)

        PR c++/15097
        * init.c (build_delete): Use build_headof to get the address of the
        complete object if we aren't using the deleting destructor.
        * rtti.c (build_headof): No longer static.
        * cp-tree.h: Declare it.

From-SVN: r128172