The MR is divided to three commits: 1. Extend AddPathCurve3 test with offset and nseg variables 2. Moving main curve implementation from GdipAddPathCurve2 to GdipAddPathCurve3, allow for use offset and nseg variables in GdipAddPathCurve3. The offset and nseg variables, will be used for fixing curve calculation in next commit. 3. Fix GdipAddPathCurve3 curve calculation with offset and nseg variables