Error parsing an empty comment

Sql (mysql, only the first five lines of the file, unix=lf-style):
```sql
-- phpMyAdmin SQL Dump
-- version 5.2.2
-- https://www.phpmyadmin.net/
--
-- Host: localhost:3306
```

```
sql parser error: Expected: an SQL statement, found: - at Line: 4, Column: 1
```

Changing `--` into `-- nop` does fix the issue.

Was parsed correctly in 0.53, is broken in 0.60 (no other versions tested).
