Start to permeate more ownership.

dw/fltkimgbuf.hh

@@ -49,10 +49,8 @@ private:
    int isRoot() { return (root == NULL); }
    void detachScaledBuf (FltkImgbuf *scaledBuf);
 
-protected:
-   ~FltkImgbuf ();
-
 public:
+   ~FltkImgbuf ();
    FltkImgbuf (Type type, int width, int height, double gamma);
 
    static void freeall ();