Sometimes alignment crashes due to auto scaling

[leloup314]

When using the 4 FE-I4 hit files from the example data, an consecutive analysis like in the eutelescope example (with default values) can be done until the alignment crashes with the above ValueError.

[DavidLP]

The real issue in your case is that there are no tracks at all to plot. But nevertheless the plotting function should not crash for no data. Fixed.

[leloup314]

This still occurs for alignment AND also for fit_tracks function for the above conditions

[DavidLP]

Ok. We should check all plotting functions that the empty data case when using a log axis is handled.