Stripe importsubscription tweaks

Hello !

I've got a few little fixes and tweaks to propose on the import code - just little things.

• Restore contribution_source
• Fix typo in variable name

api/v3/Stripe/Importsubscription.php

@@ -42,7 +42,7 @@ function civicrm_api3_stripe_importsubscription($params) {
   $custresult = civicrm_api3('StripeCustomer', 'get', $customerParams);
   if ($custresult['count'] == 0) {
     // Create the customer.
-    $cusotmerParmas['contact_id'] = $params['contact_id'];
+    $customerParams['contact_id'] = $params['contact_id'];
     $custresult = civicrm_api3('StripeCustomer', 'create', $customerParams);
   }
   $customer = array_pop($custresult['values']);
@@ -71,6 +71,7 @@ function civicrm_api3_stripe_importsubscription($params) {
       'financial_type_id' => !empty($params['financial_type_id']) ? $params['financial_type_id'] : 'Donation',
       'is_email_receipt' => !empty($params['is_email_receipt']) ? 1 : 0,
       'is_test' => isset($paymentProcessor['is_test']) && $paymentProcessor['is_test'] ? 1 : 0,
+      'contribution_source' => !empty($params['contribution_source']) ? $params['contribution_source'] : '',
     ];
     if ($params['recur_id']) {
       $contributionRecurParams['id'] = $params['recur_id'];