title: StoreKit doesn't call paymentQueue when a transaction updates
body: <p>I am trying to do a transaction using this code:</p>
  
  <pre><code>  SKPayment *payment = [SKPayment paymentWithProductIdentifier:@"com.this.is.where.the.identifier.is"];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
  </code></pre>
  
  <p>The transaction goes through fine, but <code>-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions</code> isn't called so there is no way of updating my application to enable the pro features. I have included the delegate protocol <code>SKPaymentTransactionObserver</code> in the header file.</p>