[PATCH xts] xts5: Fix clang warning - non-void function DoLayout should return a value

[Eric Anholt]

Echelon9 <rhyskidd at gmail.com> writes:

> From: Rhys Kidd <rhyskidd at gmail.com>
>
> Box.c:245:7: error: non-void function 'DoLayout' should return a value
>       [-Wreturn-type]
>                     return;
>                     ^
> Box.c:285:6: error: non-void function 'DoLayout' should return a value
>       [-Wreturn-type]
>                     return;
>                     ^
>
> Signed-off-by: Rhys Kidd <rhyskidd at gmail.com>

Applied.  Thanks!