fixes #3550 referrerCampaignName typo; thanks Christian

git-svn-id: http://dev.piwik.org/svn/trunk@7485 59fd770c-687e-43c8-a1e3-f5a4ff64c105

core/Tracker/GoalManager.php

@@ -297,7 +297,7 @@ class Piwik_Tracker_GoalManager
         
         // 0) In some (unknown!?) cases the campaign is not found in the attribution cookie, but the URL ref was found.
 		//    In this case we look up if the current visit is credited to a campaign and will credit this campaign rather than the URL ref (since campaigns have higher priority)
-		if(empty($refererCampaignName)
+		if(empty($referrerCampaignName)
 			&& $type == Piwik_Common::REFERER_TYPE_CAMPAIGN
 			&& !empty($name)
 		)