fixed two infinite recursions

modules/gfx/src/gfx_node.cc

@@ -141,7 +141,7 @@ bool GfxNode::IsAttachedToScene() const
 void GfxNode::Add(GfxObjP obj)
 {
   GfxNodeP node=obj;
-  this->Add(obj);
+  this->Add(node);
 }
 
 void GfxNode::Remove(GfxObjP obj)

modules/mol/base/src/chem_type.hh

@@ -52,7 +52,7 @@ struct ChemType {
   }
 
   bool operator!=(const ChemType& cc) const {
-    return this->operator!=(cc);
+    return cc.chem_type_!=chem_type_;
   }
 
   bool IsIon() const {