      */
     private var _requestedRowCount:int = -1;
     
-    [Inspectable(category="General")]
+    [Inspectable(category="General", minValue="-1")]
 
     /**
      *  Number of rows to be displayed.

     */
    private var _requestedColumnCount:int = -1;
    
    [Inspectable(category="General")]

    /**
     *  Number of columns to be displayed.

    private var _rowHeight:Number = NaN;

    [Bindable("propertyChange")]
    [Inspectable(category="General", minValue="0.0")]

    /**
     *  The row height.
