Zooming in meso crashes sumo-gui

[m-kro]

Using the network from #14235 . Without even starting the simulation, just zoom in with mouse control and sumo-guiD will crash here (debug mode).

https://github.com/eclipse-sumo/sumo/blob/48b570d92022eab1e3e4079cb9489496ac80a4f6/src/guisim/GUIEdge.cpp#L437

Didn't understand where the corresponding GLHelper::pushMatrix() was...