Change initial values to accomodate the change of default solver.

tests/expectations/expectation_nested.mod

@@ -28,7 +28,7 @@ initval;
 y = 1.08068253095672;
 c = 0.80359242014163;
 h = 0.29175631001732;
-k = 11.08360443260358;
+k = 12;
 a = 0;
 b = 0;
 e = 0;