21948: EDF SMESH : Memory is not freed when deleting a mesh

21948: EDF SMESH : Memory is not freed when deleting a mesh

fix leaks of cellLinks

void SMDS_MeshNode::init()
{
-  if (myVtkID >= cellLinks->GetLinksSize())
-          cellLinks->ResizeL(myVtkID+SMDS_Mesh::chunkSize);
+  cellLinks->ResizeForPoint( myVtkID );