[MinGW] Slightly More Robust Stacktraces on Windows

[Ranjit Mathew]

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Ranjit Mathew wrote:
> 
> The attached patch makes stack traces work with static
> and instance methods, compiled with or without -findirect-dispatch
> (as far as a very light testing could tell). It was tested
> using an i686-pc-linux-gnu to i686-pc-mingw32 cross-compiler.
> 
> OK to apply?

Since this was used only on Windows and it is an improvement
over what is already there, I took the liberty of committing
it to trunk.

Thanks,
Ranjit.

- --
Ranjit Mathew       Email: rmathew AT gmail DOT com

Bangalore, INDIA.     Web: http://rmathew.com/




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