rust: types: require `ForeignOwnable::into_foreign` return non-null

The intended implementations of `ForeignOwnable` will not return null
pointers from `into_foreign`, as this would render the implementation of
`try_from_foreign` useless. Current users of `ForeignOwnable` rely on
`into_foreign` returning non-null pointers. So require `into_foreign` to
return non-null pointers.

Suggested-by: Benno Lossin <[email protected]>
Suggested-by: Alice Ryhl <[email protected]>
Signed-off-by: Andreas Hindborg <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>

0 files changed, 0 insertions, 0 deletions