* c-decl.c (duplicate_decls): Revert rth's patch.  If newdecl
is in a different binding level, get its abstract origin to be
olddecl.
* tree-inline.c (expand_call_inline): Move DECL_INITIAL sanity
check earlier.
* tree.c (get_callee_fndecl): Follow DECL_ABSTRACT_ORIGIN if
DECL_INITIAL is NULL.

From-SVN: r47610