Moved init of "bn" down a bit

Author: czurnieden

mp_log.c

@@ -65,10 +65,6 @@ mp_err mp_log(const mp_int *a, const mp_int *b, int *lb)
       return MP_OKAY;
    }
 
-   if ((err = mp_init(&bn)) != MP_OKAY) {
-      return err;
-   }
-
    /* floor(log_2(x)) for cut-off */
    fla = mp_count_bits(a) - 1;
    flb = mp_count_bits(b) - 1;
@@ -97,6 +93,10 @@ mp_err mp_log(const mp_int *a, const mp_int *b, int *lb)
       goto LTM_ERR;
    }
 
+   if ((err = mp_init(&bn)) != MP_OKAY) {
+      return err;
+   }
+
    /* Check result. Result is wrong by 2(two) at most. */
    if ((err = mp_expt_n(b, n, &bn)) != MP_OKAY) {
       /* If the approximation overshot we can give it another try */