[m-dev.] trivial diff: disable deforestation

[Fergus Henderson]

Simon Taylor, you wrote:
> 
> 
> Estimated hours taken: 0.1
> 
> compiler/options.m:
> 	Disable deforestation due to a bug which has something to do with
> 	quantification and mode information not being kept consistent. 

Could you elaborate about what conditions trigger the bug?
e.g. do you have a test case?

-- 
Fergus Henderson              | Designing grand concepts is fun;
fjh at cs.mu.oz.au               | finding nitty little bugs is just work.
http://www.cs.mu.oz.au/~fjh   | -- Brooks, in "The Mythical Man-Month".
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