Non-circular Spline - looks strange or I don't get it :)

[andymel123]

https://github.com/OneLoneCoder/videos/blob/537664947db31529d2d2236deda9105ca19c041c/OneLoneCoder_Splines1.cpp#L72
Looks like this would give me the point at index 1 when I ask for index 0 and
https://github.com/OneLoneCoder/videos/blob/537664947db31529d2d2236deda9105ca19c041c/OneLoneCoder_Splines1.cpp#L106
looks like it gives me the gradient at index 1 instead of index 0.

Some thoughts:
in GetSplinePoint one could return the first control point if t==0 but I guess there simply is no gradient at the start of the spline?!