st/glsl_to_tgsi: fix block copies of arrays of structs

Use a full writemask in this case. This is relevant e.g. when a function
has an inout argument which is an array of structs.

v2: use C-style comment (Timothy Arceri)

Reviewed-by: Marek Olšák <marek.olsak@amd.com> (v1)
Cc: 13.0 <mesa-stable@lists.freedesktop.org>
1 file changed