AVX: fix (u)int_v simd_casts
AVX: fix (u)int_v simd_casts

This is makes the default casts test compile and pass.

gh-1

Signed-off-by: Matthias Kretz <372ea4eca737a13cd010ee806d4ce7b98ee71550@kde.org>

chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc,chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc