st/nine: Commit sampler views again if srgb state changed.

st/nine: Commit sampler views again if srgb state changed.

This fixes a wine test and some minor visual issues on some games.

The patch is not optimal, there is probably a more efficient way to
fix this issue, but the code there already has some innefficiencies.
There is plans to rewrite that part of the code to make it more
efficient.

Reviewed-by: Tiziano Bacocco <tizbac2@gmail.com>
Signed-off-by: Axel Davy <axel.davy@ens.fr>