Weird lines in middle of TriangleFan

[Doodlemeat]

Hello.
I´m creating a 2d vision field that originates from this: http://www.redblobgames.com/
But I have a few problems now when I draw them. This is because I use sf::Primitive::TriangleFan i think. But I dont know how to get rid of these irritating lines.



My code is to be found here:
https://github.com/doodlemeat/ProjectTerminal
https://github.com/doodlemeat/ProjectTerminal/blob/master/Stealth/LightEngine.cpp

[zsbzsb]

If it is an issue with a triangle fan array you should be able to easily write a complete and minimal example.