0024384: Wrong result obtained by Fuse

0024384: Wrong result obtained by Fuse

Changes:
1. class BOPTools
   - method:
void BOPTools_AlgoTools::MakeVertex(BOPCol_ListOfShape& aLV,
                                                              TopoDS_Vertex& aVnew)
The function fsqrt that calculates the square root of a real number
has been replaced by the standard sqrt.

2. class BOPAlgo_WireSplitter
- static function:
Standard_Real Angle2D (const TopoDS_Vertex& aV,
                         const TopoDS_Edge& anEdge,
                         const TopoDS_Face& myFace,
                         const GeomAdaptor_Surface& aGAS,
                         const Standard_Boolean aFlag)
The value parametric deltas for computations of 2D-angles
have been changed for Bezier, B-Spline 2D-curves.