[LAD] c/jack question

Pardon the newb question, but why does: a) this work --------------------------------------------- #include <jack/jack.h> jack_position_t pos; jack_transport_state_t state; jack_nframes_t frame; int process (jack_nframes_t nframes, void *arg) { state = jack_transport_query (client, &pos); frame = pos.frame; } --------------------------------------------- b) this segfaults --------------------------------------------- #include <jack/jack.h> jack_position_t *pos; jack_transport_state_t state; jack_nframes_t frame; int process (jack_nframes_t nframes, void *arg) { state = jack_transport_query (client, pos); frame = pos->frame; } Thanks