Correct check for anomalous curves

Author: sylvainpelissier

src/sage/schemes/elliptic_curves/ell_point.py

@@ -3605,11 +3605,10 @@ def discrete_log(self, Q, ord=None):
             raise ValueError('ECDLog problem has no solution (order of Q does not divide order of P)')
         E = self.curve()
         F = E.base_ring()
-        if F.is_prime_field():
-            p = F.cardinality()
-            if n == p:
-                # Anomalous case
-                return self.padic_elliptic_logarithm(Q, p)
+        p = F.cardinality()
+        if F.is_prime_field() and n == p:
+            # Anomalous case
+            return self.padic_elliptic_logarithm(Q, p)
         elif hasattr(E, '_order') and E._order.gcd(n**2) == n:
             pass    # cyclic rational n-torsion -> okay
         elif self.weil_pairing(Q, n) != 1: