Crash if post is missing flair

[MollyMaclachlan]

I broke the whole point of the program, hell yeah.

Traceback (most recent call last):
  File "/home/murdo/.grafeas/programs/clone_finder/clone_finder.py", line 109, in <module>
    checkPost(post)
  File "/home/murdo/.grafeas/programs/clone_finder/clone_finder.py", line 34, in checkPost
    if post.link_flair_text is None and post.title == Globals.data["previousPostTitle"]:
AttributeError: 'Globals' object has no attribute 'data'

It should be Globals.postData instead.

Will add to next update.