panvk: Add missing util_dynarray_init() in panvk_cmd_open_batch()

Doesn't make a difference in practice, because we are allocating with
zalloc, but let's explicitly call util_dynarray_init() for correctness.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28104>

src/panfrost/vulkan/panvk_cmd_buffer.c

@@ -551,6 +551,8 @@ panvk_cmd_open_batch(struct panvk_cmd_buffer *cmdbuf)
    cmdbuf->state.batch =
       vk_zalloc(&cmdbuf->vk.pool->alloc, sizeof(*cmdbuf->state.batch), 8,
                 VK_SYSTEM_ALLOCATION_SCOPE_OBJECT);
+   util_dynarray_init(&cmdbuf->state.batch->jobs, NULL);
+   util_dynarray_init(&cmdbuf->state.batch->event_ops, NULL);
    assert(cmdbuf->state.batch);
    return cmdbuf->state.batch;
 }