The 'or' needs to be 'and'

[Marxlp]

px4tools/px4tools/ulog.py

Line 156 in 665502d

elif 't_vehicle_groundtruth_0__f_q_0_' in df or 't_vehicle_local_position_0__f_x' in df:

When use px4tools, I encountered the error shown as below:

'DataFrame' object has no attribute 't_vehicle_groundtruth_0__f_q_0_'

After tracing the error, I found a bug. In my ulog data I have t_vehicle_local_position_0__f_x but no t_vehicle_groundtruth_0__f_q_0_. But the code under the if statement rely on both of them, the code below shouldn't be executed.