field.c: Convert external-format field element to hex/octal.

Rather than going through the effort of calculating the external
representation of the field element and then returning the internal
version.

diff --git a/field.c b/field.c
index 024c578..fae0365 100644 (file)
--- a/field.c
+++ b/field.c
@@ -274,7 +274,7 @@ static PyObject *fe_pylong(PyObject *x)
 #define BASEOP(name, radix, pre)                                       \
   static PyObject *fe_py##name(PyObject *x) {                          \
     mp *xx = F_OUT(FE_F(x), MP_NEW, FE_X(x));                          \
-    PyObject *rc = mp_topystring(FE_X(x), radix, 0, pre, 0);           \
+    PyObject *rc = mp_topystring(xx, radix, 0, pre, 0);                        \
     MP_DROP(xx);                                                       \
     return (rc);                                                       \
   }