fixes for errors which happen during build if VIO_DEBUG is enabled

Author: kmatveev

src/jrd/vio.cpp

@@ -3862,7 +3862,7 @@ Record* VIO_record(thread_db* tdbb, record_param* rpb, const Format* format, Mem
 	jrd_rel* relation = rpb->rpb_relation;
 	VIO_trace(DEBUG_TRACE,
 		"VIO_record (rel_id %u, record_param %" QUADFORMAT"d, format %d, pool %p)\n",
-		relation->rel_id, rpb->rpb_number.getValue(), format ? format->fmt_version : 0,
+		relation ? relation->rel_id : 0, rpb->rpb_number.getValue(), format ? format->fmt_version : 0,
 		(void*) pool);
 #endif
 
@@ -4996,7 +4996,7 @@ static UCHAR* delete_tail(thread_db* tdbb,
 	jrd_rel* relation = rpb->rpb_relation;
 	VIO_trace(DEBUG_WRITES,
 		"delete_tail (rel_id %u, record_param %" QUADFORMAT"d, prior_page %" SLONGFORMAT", tail %p, length %u)\n",
-		relation->rel_id, rpb->rpb_number.getValue(), prior_page, tail, tail_length);
+		relation->rel_id, rpb->rpb_number.getValue(), prior_page, tail, tail_end - tail);
 
 	VIO_trace(DEBUG_WRITES_INFO,
 		"   tail of record  %" SLONGFORMAT":%d, rpb_trans %" SQUADFORMAT