Make body_owned_by return the body directly.

Almost all callers want this anyway, and now we can use it to also return fed bodies

compiler/rustc_mir_transform/src/lib.rs

@@ -226,7 +226,8 @@ fn mir_keys(tcx: TyCtxt<'_>, (): ()) -> FxIndexSet<LocalDefId> {
     // typeck instead of during ast lowering, like all other bodies so far.
     for def_id in tcx.hir().body_owners() {
         // Incremental performance optimization: only load typeck results for things that actually have inline consts
-        if tcx.hir_owner_nodes(tcx.hir().body_owned_by(def_id).hir_id.owner).has_inline_consts {
+        if tcx.hir_owner_nodes(tcx.hir().body_owned_by(def_id).id().hir_id.owner).has_inline_consts
+        {
             set.extend(tcx.typeck(def_id).inline_consts.values())
         }
     }