hnetcfg: Initialize INetFwRules::get__NewEnum out parameter.

dlls/hnetcfg/policy.c

@@ -238,6 +238,10 @@ static HRESULT WINAPI netfw_rules_get__NewEnum(
     fw_rules *This = impl_from_INetFwRules( iface );
 
     FIXME("%p, %p\n", This, newEnum);
+
+    if (!newEnum) return E_POINTER;
+    *newEnum = NULL;
+
     return E_NOTIMPL;
 }
 

dlls/hnetcfg/tests/policy.c

@@ -60,6 +60,9 @@ static void test_policy2_rules(INetFwPolicy2 *policy2)
         INetFwServiceRestriction_Release(restriction);
     }
 
+    hr = INetFwRules_get__NewEnum(rules, NULL);
+    ok(hr == E_POINTER, "got %08x\n", hr);
+
     INetFwRules_Release(rules);
     INetFwRules_Release(rules2);
 }