[PlantVisualiser]: Segmentation fault for visualisation of high-time-res

[dhelmrich]

The vis code crashes with a segmentation fault upon running the simulation with a high time precision. Example of run with 24 steps per day, last output:

Organism::simulate: from 5.25 to 5.29167 days
Organ::createSegments(): 3 length increment below dxMin threshold (3.63598e-15 < 1e-06) and kept in memory
Stem::storeLinkingNodeLocalId 1 40 1
Stem::storeLinkingNodeLocalId 2 41 2
Stem::storeLinkingNodeLocalId 3 42 3
Stem::storeLinkingNodeLocalId 4 43 4
Stem::storeLinkingNodeLocalId 5 44 5
Stem::storeLinkingNodeLocalId 6 45 6
Stem::storeLinkingNodeLocalId 7 46 7
Stem::storeLinkingNodeLocalId 8 47 8
Stem::storeLinkingNodeLocalId 9 48 9
nodes moved 67
new nodes added 19
segments added 19
Number of segments 171, including 19 new
Generating radial leaf geometry
Segmentation fault

I will investigate this issue and fix it as soon as reasonable. It might be an issue with the vis code not able to properly take care of leafs with a low number of nodes (possibly just one). This edge-case should be handled correctly.