Modify deallocation of poolStorage object in order to fix a memory bug.

include/dynamic-graph/pool.h

@@ -76,6 +76,10 @@ namespace dynamicgraph
     */
     void deregisterEntity (const std::string& entname);
 
+    /*! \brief Unregister an entity.
+      \par[in] entity: iterator in the map,
+    */
+    void deregisterEntity( const Entities::iterator& entity );
     /*! \brief Get an entity.
       \par[in] entname: The name of the entity,
       \return Pointer towards the entity.

src/dgraph/pool.cpp

@@ -48,11 +48,12 @@ PoolStorage::
     {
       dgDEBUG(15) << "Delete \""
 		   << (iter->first) <<"\""<<std::endl;
-      delete ((Entity*)iter->second);
+      Entity* entity = iter->second;
+      deregisterEntity(iter);
+      delete (entity);
     }
 
   dgDEBUGOUT(15);
-  return;
 }