Solid circle primitive is missing a triangle

[Guillaume227]

Adding one extra vertex in solid circle primitive in order to fill missing triangle.

This is what I see with the following code:

		auto const circle = Primitives::Circle::solid(6);
		
		_vertexBuffer.setData(circle.positions(0), BufferUsage::StaticDraw);
		_mesh.setPrimitive(circle.primitive())
			.setCount(circle.positions(0).size())
			.addVertexBuffer(_vertexBuffer, 0, Shaders::Flat2D::Position{})

[mosra]

Hi,

sorry, somehow missed the GitHub notifications so I'm answering late. Thanks a lot for the fix, I'm stupid :) I apparently misunderstood how triangle fan primitive works (I thought it closes itself) and never bothered to test properly.

Applied your patch as 059f139 (updating the unit test as well, so the builds pass).