Negative indentLevel throwing RangeError when prettyPrinting

[lathonez]

Believe it or not this is from a real world example. Found on http://pro.jsonlint.com and followed back here.

Simplest replication I can find:

air:~$ cat bad.json
{
        "key": "value"
}
}
}
air:~$ jsonlint -p bad.json
[RangeError: Invalid array length]
undefined

Without pretty printing it works fine as the formatter isn't used:

air:~$ jsonlint bad.json
[Error: Parse error on line 3:
...  "key": "value"}}}
--------------------^
Expecting 'EOF', got '}']

My fix is to force the count value to zero inside jsl.format.repeat if it happens to be negative, which gives the following output:

air:~$ jsonlint -p bad.json
[Error: Parse error on line 3:
...  "key": "value"}}}
--------------------^
Expecting 'EOF', got '}']
{
  "key": "value"
}
}
}