patch to add “width” function for outputting integers to uClibc++

[Carmelo Amoroso]

Peter Nixon wrote:
> The attached patch teaches uCLibc++ about the “width” function for outputting 
> integers, so if you had a value of 3 and wanted the output “003”, we 
> previously just got “3”.
> 
> This is required for PTLib and OPAL to work correctly 
> (http://www.opalvoip.org/)
> 
> Regards
> 
> 
> 
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applied. Thanks.

Carmelo