reset MElement::tolerance to the correct value

Geo/MElementOctree.cpp

@@ -80,7 +80,6 @@ MElementOctree::MElementOctree(GModel *m) : _gm(m)
 
 MElementOctree::MElementOctree(std::vector<MElement*> &v)
 {
-  _gm = 0;
   SBoundingBox3d bb;
   for (unsigned int i = 0; i < v.size(); i++){
     for(int j = 0; j < v[i]->getNumVertices(); j++){
@@ -118,7 +117,7 @@ MElement *MElementOctree::find(double x, double y, double z, int dim)
   MElement *e = (MElement*)Octree_Search(P, _octree);
   
   if (!e){
-    double initialTol = 1.e-6;
+    double initialTol = MElement::getTolerance();
     double tol = initialTol;
     while (tol < .1){
       tol *= 10;
@@ -151,4 +150,3 @@ MElement *MElementOctree::find(double x, double y, double z, int dim)
   }
   return NULL;
 }
-