Fix up two more links

thanks @Havvy

Author: steveklabnik

src/type-layout.md

@@ -281,7 +281,7 @@ padding bytes and forcing the alignment of the type to `1`.
 [`size_of`]: ../std/mem/fn.size_of.html
 [`Sized`]: ../std/marker/trait.Sized.html
 [dynamically sized types]: dynamically-sized-types.html
-[C-like enumerations]: items/enumerations.html#c-like-enumerations
-[zero-variant enumerations]: items/enumerations.html#zero-variant-enumerations
+[C-like enumerations]:  items/enumerations.html#custom-discriminant-values-for-field-less-enumerations
+[zero-variant enumerations]: items/enumerations.html#zero-variant-enums
 [undefined behavior]: behavior-considered-undefined.html
 [27060]: https://github.com/rust-lang/rust/issues/27060