radeonsi: fix indirect dispatches with variable block sizes

The block size input was uninitialized.

Fixes: 77c81164bc1c "radeonsi: support ARB_compute_variable_group_size"

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6782>
1 file changed