`FieldEq` wrong for `Option<ForeignModelByField>`

[gammelalf]

impl<'rhs, FF> FieldEq<'rhs, FF::Type, FieldEq_ForeignModelByField_Owned> for Option<ForeignModelByField<FF>> should read impl<'rhs, FF> FieldEq<'rhs, Option<FF::Type>, FieldEq_ForeignModelByField_Owned> for Option<ForeignModelByField<FF>>

and likewise for the borrowed version