RSAbstractTick crashes when creating a bar plot with only one value

[jordanmontt]

When creating a bar plot that has only one value, the ticks are updated like this:

RSAbstractTick>>fromNames: aCollectionOfStrings
    self
        doNotUseNiceLabel;
        numberOfTicks: aCollectionOfStrings size-1.

So, as aCollectionOfStrings size is one, the value is set to 0 which produces an exception in the debugger

[akevalion]

I have created a control in fromNames:. But I think this is something that is not totally clear in roassal chart library. A todo for a new chart library based on https://github.com/sambegou122/DLPoster mathplotlib and ggplot