h:panelGrid columnClasses: classes are not used repetitively

Classes specified in columnClasses attribute of h:panelGrid should be reused when number of classes are less than the number of columns. This behavior is not implemented.
In org.apache.myfaces.renderkit.html.HtmlGridRendererBase.java, renderChildren method, columnClassesArray needs to be indexed by another index variable, say, columnClassIndex, not by columnIndex.