fix memory leak in ExtrudeParams

Geo/ExtrudeParams.cpp

@@ -156,15 +156,14 @@ ExtrusionElementMap::addExtrudedElem(MElement* source, MElement* extrudedElem)
   if(it != _extrudedElements.end())
     it->second.push_back(extrudedElem);
   else {
-   std::vector<MElement*>* vec = new std::vector<MElement*>();
     int totalNbElems = 0;
     for (int i = 0; i <_parent->mesh.NbLayer;i++)
       totalNbElems += _parent->mesh.NbElmLayer[i];
+    // This expression automatically creates the new map key
+    std::vector<MElement*> *vec = &(_extrudedElements[source]);
     vec->reserve( totalNbElems );
     vec->push_back( extrudedElem );
-   _extrudedElements.insert(std::pair<MElement*, std::vector<MElement*> >(source, *vec));
   }
-  SPoint3 np = extrudedElem->barycenter(), sp = source->barycenter();
 }
 
 // Propagates the partition information from the source elements to