Local function overloading

[Philpax]

Thanks! I used the static struct solution.

I did some quick research, and I think that the reason why the 
original code doesn't work is because the two functions have the 
same identifier, which results in Dsymboltable::insert rejecting 
the second function. I haven't tested this hypothesis, but I 
suspect this to be the case.

A simple solution would be to assign unique identifiers to each 
function, but I haven't experimented with DMD source enough to 
determine what the side-effects of such a change would be. Is not 
being able to overload functions in local scope intended 
behaviour?