C++ help needed fixing VXL on 32 bit architectures

Hi everyone,

After spending quite a bit of time fixing VXL to build, I've now run
into errors with it building on 32 bit arches.

Unfortunately, I don't foresee myself having enough cycles in the near
future to debug the C++ bits to see what's happening here, and while I
have filed a ticket upstream, they seem to be even busier than us (all
issues seem to get a "A PR would be welcome" response)

<a href="" title=""></a>

Any chance any C++ ninjas here would have some time to look into this
please? A PR fixing the issue upstream would be absolutely fantastic.