static u32 vidtv_mux_pad_with_nulls(struct vidtv_mux *m, u32 npkts)
 {
-       struct null_packet_write_args args = {};
+       struct null_packet_write_args args = {
+               .dest_buf           = m->mux_buf,
+               .buf_sz             = m->mux_buf_sz,
+               .dest_offset        = m->mux_buf_offset,
+       };
        u32 initial_offset = m->mux_buf_offset;
        struct vidtv_mux_pid_ctx *ctx;
        u32 nbytes;
 
        ctx = vidtv_mux_get_pid_ctx(m, TS_NULL_PACKET_PID);
 
-       args.dest_buf           = m->mux_buf;
-       args.buf_sz             = m->mux_buf_sz;
        args.continuity_counter = &ctx->cc;
-       args.dest_offset        = m->mux_buf_offset;
 
        for (i = 0; i < npkts; ++i) {
                m->mux_buf_offset += vidtv_ts_null_write_into(args);