Fix crash in header

[mattabullock]

Traceback (most recent call last):
  File "royals-main.py", line 226, in <module>
    program.run()
  File "royals-main.py", line 171, in run
    str = edit.generatecode(d)
  File "/home/pi/bots/royals-bot/src/editor.py", line 73, in generatecode
    if self.header: code = code + self.generateheader(files)
  File "/home/pi/bots/royals-bot/src/editor.py", line 106, in generateheader
    game = files["linescore"].get('data').get('game')
KeyError: 'linescore'