Autotest: Autotest fails if no magazines array is declared.

[Drofseh]

If a loadout class has no magazines array TMF Autotest fails to run.

class testClassA {
    displayName = "Test Loadout A";
    // No magazines, failure!
};

class testClassB {
    displayName = "Test Loadout B";
    magazines[] = {}; // Empty magazines, success!
};