int pow on Win32 -- and nth1/3

Hello,

With gprolog-1.4.0-mingw-x86, I observe the following oddity:

   | ?- N is 10^2.
   N = 99
   yes

The problem does not appear on Linux gprolog-1.4.0 (sorry, I didn't have the 
resources to test the latest build on Win32).

And by the way, gprolog-1.4.0 (both Linux and Win32) seems to have introduced 
nth1/3 as an (apparently) undocumented "clone" of the nth/3 predicate:

   | ?- nth(2,[a,b,c],X).
   X = b
   yes
   | ?- nth1(2,[a,b,c],X).
   X = b
   yes

Best regards.