Bitwise ghost implementation - clear winner tie

[AgeManning]

This issue refers to the bitwise LMD Ghost implementation:
https://github.com/ethereum/research/blob/master/ghost/ghost.py

In the event a chain has two children of equal weight and the log lookup is successful, the implementation calls get_clear_winner(). This will choose a winner based on the ordering of the python dictionary (in contrast to the bitwise selection which breaks ties based on lowest hash of the block). See line:

research/ghost/ghost.py

Line 67 in 7db6b87

if v >= total_vote_count // 2:

Should this perhaps be > rather than >= as it seems that a clear winner is not obvious for equally weighted children.