catch OCC exception in addShape

Geo/GModelIO_OCC.cpp

@@ -499,6 +499,7 @@ void GModel::addShape(std::string name, std::vector<double> &p,
   else if(op == "Fuse" || op == "Union") o = OCC_Internals::Fuse;
   else if(op == "Intersection") o = OCC_Internals::Intersection;
   
+  try{
     if (name == "Sphere"){
       if (p.size() != 4){
         Msg::Error("4 parameters have to be defined for a sphere");
@@ -550,6 +551,10 @@ void GModel::addShape(std::string name, std::vector<double> &p,
       _occ_internals->buildGModel(this);
     }
   }
+  catch(Standard_Failure &err){
+    Msg::Error("%s", err.GetMessageString());
+  }
+}
 
 TopoDS_Shape  GlueFaces (const TopoDS_Shape& theShape,
 			 const Standard_Real theTolerance)

Geo/GModelIO_OCC.h

@@ -48,7 +48,6 @@ class OCC_Internals {
   void buildLists();
   void removeAllDuplicates(const double &tolerance);
 
-  void Cone(const SPoint3 &p1, const SPoint3 &p2, const BooleanOperator &op);
   void Box(const SPoint3 &p1, const SPoint3 &p2, const BooleanOperator &op);
   void Sphere(const SPoint3 &center, const double &radius, const BooleanOperator &op);
   void Cylinder(const SPoint3 &bottom_center, const SVector3 &dir, double R, double H,