stl_algo.h name conflict with gcc internal

[Benjamin Kosnik]

Ok, I see what you're up against now. Can you go ahead and send a me a
patch for all __op* names based on v-3, and I'll retrofit it into egcs? 

thanks,
Benjamin

> 
> [---]$ cat opr.cc
> struct C {
>     operator long double() {}
> };
> #include <algorithm>