SingleColumnParser/ScalarColumnParser: wrong precondition

[jhonnen]

Both parseRow() methods throw an exception if the column count is != 0 instead of when it is != 1:

override fun parseRow(columns: Array): T {
    if (columns.size() != 0)
        throw SQLiteException("Invalid row: row for SingleColumnParser must contain exactly one column")
    [suppress("UNCHECKED_CAST")]
    return columns[0] as T
}

[yanex]

Fixed. Thank you!