Index: trunk/MagicSoft/Mars/mgui/MCamEvent.h
===================================================================
--- trunk/MagicSoft/Mars/mgui/MCamEvent.h	(revision 7749)
+++ trunk/MagicSoft/Mars/mgui/MCamEvent.h	(revision 7780)
@@ -11,4 +11,6 @@
 {
 public:
+    virtual ~MCamEvent() { }
+
     virtual Bool_t GetPixelContent(Double_t &val, Int_t idx, const MGeomCam &cam, Int_t type=0) const = 0;
     virtual void   DrawPixelContent(Int_t num) const = 0;