rec_get_converted_size_new(): The total size of the infimum and supremum

records in ROW_FORMAT=COMPACT is REC_N_NEW_EXTRA_BYTES + 8.  The
REC_N_NEW_EXTRA_BYTES was accidentally omitted in r1546.  This function
should never be called on those records, though.

rem/rem0rec.c

@@ -459,10 +459,10 @@ rec_get_converted_size_new(
 		break;
 	case REC_STATUS_INFIMUM:
 	case REC_STATUS_SUPREMUM:
-		/* infimum or supremum record, 8 bytes */
-		return(8); /* no extra data needed */
+		/* infimum or supremum record, 8 data bytes */
+		return(REC_N_NEW_EXTRA_BYTES + 8);
 	default:
-		ut_a(0);
+		ut_error;
 		return(ULINT_UNDEFINED);
 	}