Hugs990121: builtin pi missing precision

[Friedhelm Wrensch]

Hello,

I suggest the following change to "builtin.c", near line 1242:

CAFFloat(primPiFloat,(Float)(4*atan(1))) /* Float pi primitive            */

Alternatively, one could define

  pi = 4 * atan(1)

in the Prelude.


Friedhelm