never read variable in CSceneNodeAnimatorFlyCircle

[pok]

//! animates a scene node
void CSceneNodeAnimatorFlyCircle::animateNode(ISceneNode* node, u32 timeMs)
{
core::matrix4 mat; //never read

f32 t = (timeMs-StartTime) * Speed;

core::vector3df circle(Radius * (f32)sin(t), 0, Radius * (f32)cos(t));
node->setPosition(Center + circle);
}