st/nine: Fix BASETEX_REGISTER_UPDATE
st/nine: Fix BASETEX_REGISTER_UPDATE

BASETEX_REGISTER_UPDATE was adding the texture to the list
of textures to upload in too many cases. tex->base.base.bind
will be set to true if the texture is in a stateblock, whereas
we want to upload only if bound to the device, which is
what bind_count is for.

Signed-off-by: Axel Davy <2b6ef604b998fb81662f85c329e4fc020eae8e5d@ens.fr>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler