Simulator cannot go through character selection anymore

[Babouchot]

When trying to choose 2 different roles, one get stuck on the role screen in the simulator

[Babouchot]

We changed the size of the header (that contains the size of the message) for network messages in order to make the team game work with pictures and their long paths : f621ffb . Previously on one byte, now on 2 bytes.
But the LudoMuse:bytes protocol was not updated accordingly and still considers a 1 byte header in both unix and windows emulator codebases.