Mesh - Import of STEP file crashes at the very end when visualizing the boundary...

Mesh - Import of STEP file crashes at the very end when visualizing the boundary curves (#745)

When an edge (BRepMeshData_Edge) has multiple PCurve curves (IMeshData_PCurve) with different orientations, the index array is filled for only one PCurve curve.
This would cause problems later, so a fix was made to fill index arrays for curves with another orientation.