adding some virtual dtors

git-svn-id: http://svn.berlios.de/svnroot/repos/sems/trunk@1637 8eb893ce-cfd4-0310-b710-fb5ebe64c474

apps/py_sems/PySemsB2ABDialog.h

@@ -39,7 +39,7 @@ class PySemsB2ABDialog : public AmB2ABCallerSession,
 
   PySemsB2ABDialog();
   PySemsB2ABDialog(AmDynInvoke* user_timer);
-  ~PySemsB2ABDialog();
+  virtual ~PySemsB2ABDialog();
 
   void onSessionStart(const AmSipRequest& req);
 
@@ -65,7 +65,7 @@ class PySemsB2ABCalleeDialog : public AmB2ABCalleeSession
  PySemsB2ABCalleeDialog(const string& other_local_tag, 
 			AmSessionAudioConnector* connector)
    : AmB2ABCalleeSession(other_local_tag, connector) { }
-
+  virtual ~PySemsB2ABCalleeDialog() { }
  protected:
   void onB2ABEvent(B2ABEvent* ev);
 

apps/py_sems/PySemsB2BDialog.h

@@ -38,7 +38,7 @@ class PySemsB2BDialog : public AmB2BCallerSession,
 
   PySemsB2BDialog();
   PySemsB2BDialog(AmDynInvoke* user_timer);
-  ~PySemsB2BDialog();
+  virtual ~PySemsB2BDialog();
 
   void onSessionStart(const AmSipRequest& req);
 

apps/py_sems/PySemsDialog.h

@@ -41,7 +41,7 @@ class PySemsDialog  :  public AmSession,
 
   PySemsDialog();
   PySemsDialog(AmDynInvoke* user_timer);
-  ~PySemsDialog();
+  virtual ~PySemsDialog();
 
   void onSessionStart(const AmSipRequest& req);