Skip incorrect jsons

[NLZ]

If the json is incorrect (for example script failed on Issue #5) then it leaves behind an invalid json. My suggestion would be to catch errors from the json loading https://github.com/Rudoal/mdownloader/blob/9114ed091215d9da60ee2f2526c78d6c9a214065/components/jsonmaker.py#L182-L188 So here I would do it like this:

    def checkExist(self):
        if os.path.exists(self.json_path):
            try:
                with open(self.json_path, 'r') as file:
                    series_json = json.load(file)
                return series_json
            except json.decoder.JSONDecodeError:
                return {}
        else:
            return {}

Here is the error trace:

Traceback (most recent call last):
  File "C:\Users\nlz\Code\mdownloader\mdownloader.py", line 120, in <module>
    before_main(args.id, args.language, args.directory, args.type, args.folder, args.save_format, args.covers)
  File "C:\Users\nlz\Code\mdownloader\mdownloader.py", line 102, in before_main
    main(id, language, directory, type, folder, save_format, covers)
  File "C:\Users\nlz\Code\mdownloader\components\main.py", line 103, in main
    typeChecker(id, language, route, type, make_folder, save_format, covers)
  File "C:\Users\nlz\Code\mdownloader\components\main.py", line 18, in typeChecker
    downloadBatch(id, language, route, type, make_folder, save_format, covers)
  File "C:\Users\nlz\Code\mdownloader\components\downloader.py", line 184, in downloadBatch
    json_file = TitleJson(data, series_route, covers)
  File "C:\Users\nlz\Code\mdownloader\components\jsonmaker.py", line 22, in __init__
    self.data_json = self.checkExist()
  File "C:\Users\nlz\Code\mdownloader\components\jsonmaker.py", line 186, in checkExist
    series_json = json.load(file)
  File "C:\Python39\lib\json\__init__.py", line 293, in load
    return loads(fp.read(),
  File "C:\Python39\lib\json\__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "C:\Python39\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Python39\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 24 column 26 (char 805)

(maybe I should've done a pull request, but I'm too lazy tonight)

[ArdaxHz]

Fixed in 2.7.2, I just saw these issues before going to bed, good thing they weren't too hard to fix.