Make destructors virtual so if need arises, we can provide API for subclasses in a BC way

src/vcs/vcsannotation.h

@@ -45,7 +45,7 @@ class KDEVPLATFORMVCS_EXPORT VcsAnnotation
 public:
     VcsAnnotation();
     VcsAnnotation(const VcsAnnotation&);
-    ~VcsAnnotation();
+    virtual ~VcsAnnotation();
     /**
      * @return the local url of the file
      */

src/vcs/vcsdiff.h

@@ -53,7 +53,7 @@ public:
     };
 
     VcsDiff();
-    ~VcsDiff();
+    virtual ~VcsDiff();
     VcsDiff( const VcsDiff& );
 
     /**

src/vcs/vcsevent.h

@@ -60,7 +60,7 @@ public:
     Q_DECLARE_FLAGS( Actions, Action )
 
     VcsItemEvent();
-    ~VcsItemEvent();
+    virtual ~VcsItemEvent();
     VcsItemEvent(const VcsItemEvent& );
 
     QString repositoryLocation() const;
@@ -92,7 +92,7 @@ class KDEVPLATFORMVCS_EXPORT VcsEvent
 {
 public:
     VcsEvent();
-    ~VcsEvent();
+    virtual ~VcsEvent();
     VcsEvent( const VcsEvent& );
     VcsRevision revision();
     QString author();

src/vcs/vcshelpers.h

@@ -60,7 +60,7 @@ public:
     };
 
     VcsMapping();
-    ~VcsMapping();
+    virtual ~VcsMapping();
     VcsMapping(const VcsMapping&);
 
     void addMapping( const QString& sourceLocation,