Invalid log configurations size check

[krichardsson]

When setting up log configurations it is possible to add log variables up to a certain limit. The limit is based on the packe size and the size of the chosen log variables, they must all fit into the packet.
The client checks this limit and it is only possible to save configurations that are OK.

There seems to be a problem with the size check though and configurations that are slightly too big can be saved. The result is that the CF rejects the config and unfortunately there is no feedback to the user, the end result is that no log data is sent to the client and no logs appear in the log window.

Size checks in the client is done in https://github.com/bitcraze/crazyflie-clients-python/blob/master/src/cfclient/ui/dialogs/logconfigdialogue.py#L119-L126

This issue is related to bitcraze/crazyflie-firmware#48 and bitcraze/crazyflie-firmware#120

[krichardsson]

Can't be reproduced