[CForms] Changing the JXPathBindingBase.java

[Joerg Heinicke]

Regularly I have a problem with NPEs in binding when the binding 
references an ID which does not exist in the definition. The NPE is 
thrown in ValueJXPathBinding.java, line 129. What I want to add is to 
throw an Exception before depending on a null test on the widget. 
Therefore the method should declare that it throws a checked exception.

Has anybody any objections against the change of
public abstract void doLoad(Widget frmModel, JXPathContext jxpc);
to
public abstract void doLoad(Widget frmModel, JXPathContext jxpc) throws 
BindingException;
in org.apache.cocoon.woody.binding.JXPathBindingBase.java, line 149?

Joerg