Offense is sometimes null when starting the game

[agude]

The entire first drive is wrong here: https://github.com/Ten-Point-Touchdowns/Football-Data/blob/6c6f6c20d20d1c7764e8c80d53299022cfb9c484/reco/2003/2003_20031109_ARI_at_PIT.json#L42

The raw data for the first play is: "--"
It also has the yard line of the kick: "CRD 30" This will tell us the kicking team.

Notice the the "0th" play is missing. This might be the problem.