[ic] Patch to differentiate between free shipping and unavailable shipping methods

[Stefan Hornburg]

Mark Lipscombe wrote:
> Hi,
> 
> Here is a small patch which lets Vend::Ship::shipping return undefined 
> when a cost cannot be calculated for shipping.  This allows ITL code 
> like this:
> 
> [either][shipping][or]Not enough info[/either]
> 
> This allows you to have free shipping options, but not show them if a 
> shipping calculation cannot be done (for example if that shipping method 
> isn't available to that location).
> 
> It applies cleanly against CVS HEAD, and also applies with fuzz to 5.4 
> and 5.6 versions of IC.

OK, sounds reasonable to me. Any objections (besides the debug code which
needs to be removed) ?

Regards
	Racke


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