int pos = (mb_y << 16) | (mb_x & 0xFFFF); \
int sliced_threading = (avctx->active_thread_type == FF_THREAD_SLICE) && \
(num_jobs > 1); \
- int is_null = (next_td == NULL) || (prev_td == NULL); \
+ int is_null = !next_td || !prev_td; \
int pos_check = (is_null) ? 1 \
: (next_td != td && \
pos >= next_td->wait_mb_pos) || \