Committing latest patch on Issue 708374 to SVN (adding offset to mmap)

[Travis Oliphant]

Hi all,

I think the latest patch for fixing Issue 708374 (adding offset to mmap) 
should be committed to SVN.

I will do it, if nobody opposes the plan.  I think it is a very 
important addition and greatly increases the capability of the mmap module.

Thanks,

-Travis Oliphant