trying to get lal_pacer to print in CI again

gst/lal/gstlal_pacer.c

@@ -167,7 +167,7 @@ static GstFlowReturn transform_ip(GstBaseTransform *trans, GstBuffer *buf) {
 
 	time_to_push_buffer = element->real_t0 + (stream_time - element->t0) / element->speed;
 	wait_time = time_to_push_buffer > current_time ? time_to_push_buffer - current_time : 0;
-	g_print("real_t0=%lu\nt0=%lu\ncurrent_time=%lu\nstream_time=%lu\ntime_to_push_buffer=%lu\nwait_time=%lu", element->real_t0, element->t0, current_time, stream_time, time_to_push_buffer, wait_time);
+	g_printerr("real_t0=%lu\nt0=%lu\ncurrent_time=%lu\nstream_time=%lu\ntime_to_push_buffer=%lu\nwait_time=%lu", element->real_t0, element->t0, current_time, stream_time, time_to_push_buffer, wait_time);
 
 	sleep(wait_time / 1000000000.0);