[html-formfu] Bug fix to HTML::FormFu::Model::DBIC delete_if_true

[Nigel Metheringham]

I've just pushed a change -
   http://code.google.com/p/html-formfu/source/detail?r=1528

that makes delete_if_true work if the form chunk is surrounded by  
another block (in my case I have a Fieldset within the Repeatable for  
the has_many rel).

Without this, if the has_many form chunk was within another block an  
exception was thrown in remove_element

I think there is a very similar bug in delete_if_empty but that throws  
an exception in a way I haven't yet been able to trace.

	Nigel.
--
[ Nigel Metheringham             Nigel.Metheringham at InTechnology.com ]
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