bug swiftmailer#385 NullTransport should report that all emails have been delivered. (michaldudek)

This PR was merged into the 5.2-dev branch.

Discussion
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NullTransport should report that all emails have been delivered.

The PHPDoc for ```NullTransport``` says:

> Pretends messages have been sent, but just ignores them.

However it returns ```0``` from ```send()``` method saying that no mail has been delivered.

It should return number of recipients.

Commits
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157ca16 NullTransport should report that all emails have been delivered.

Author: fabpot

lib/classes/Swift/Transport/NullTransport.php

@@ -73,7 +73,13 @@ public function send(Swift_Mime_Message $message, &$failedRecipients = null)
             $this->_eventDispatcher->dispatchEvent($evt, 'sendPerformed');
         }
 
-        return 0;
+        $count = (
+            count((array) $message->getTo())
+            + count((array) $message->getCc())
+            + count((array) $message->getBcc())
+            );
+
+        return $count;
     }
 
     /**