make function consisten with other ost function calls

modules/mol/base/src/editor_base.cc

@@ -208,9 +208,13 @@ void EditorBase::RenumberAllResidues(int start, bool keep_spacing)
   ent_.Impl()->RenumberAllResidues(start, keep_spacing);
 }
 
-void EditorBase::RenumberChain(const String& name, int start, bool keep_spacing)
+void EditorBase::RenumberChain(const ChainHandle& chain, int start, bool keep_spacing)
 {
-  ent_.Impl()->RenumberChain(name, start, keep_spacing);
+  CheckHandleValidity(chain);
+  if(chain.GetEntity()!=ent_){
+    throw Error("Chain does not belong to the editors entity!");
+  }
+  chain.Impl()->RenumberAllResidues(start, keep_spacing);
 }
 
 void EditorBase::RenameAtom(AtomHandle atom, const String& new_name)

modules/mol/base/src/editor_base.hh

@@ -293,7 +293,7 @@ public:
   /// \param keep_spacing
   ///           If set to false, residues will continously be renumbered ongoing from start.
   ///           Otherwise the spacings between the residues are kept.
-  void RenumberChain(const String& name, int start, bool keep_spacing);
+  void RenumberChain(const ChainHandle& chain, int start, bool keep_spacing);
     
   /// \brief Get edit mode of editor
   EditMode GetMode() const {return mode_;}

modules/mol/base/src/impl/entity_impl.cc

@@ -1202,16 +1202,4 @@ void EntityImpl::RenumberAllResidues(int start, bool keep_spacing)
 
 }
 
-void EntityImpl::RenumberChain(const String& name, int start, bool keep_spacing)
-{
-  ChainImplPtr ch=this->FindChain(name);
-
-  if(!ch) {
-    throw Error("Could not find chain with name "+name);
-  }
-
-  ch->RenumberAllResidues(start, keep_spacing);
-
-}
-
 }}} // ns

modules/mol/base/src/impl/entity_impl.hh

@@ -251,8 +251,6 @@ public:
 
   void RenumberAllResidues(int start, bool keep_spacing);
 
-  void RenumberChain(const String& name, int start, bool keep_spacing);
-
 private:
   void DoCopy(EntityImplPtr dest);