fixed typo and redundant method call

lib/base.php

@@ -555,9 +555,8 @@ class OC{
 			// if you reach this point you have changed your password 
 			// or you are an attacker
 			// we can not delete tokens here because users may reach 
-			// this point multible times after a password change
+			// this point multiple times after a password change
 			OC_Log::write('core', 'Authentication cookie rejected for user '.$_COOKIE['oc_username'], OC_Log::WARN);
-			OC_User::unsetMagicInCookie();
 		}
 		OC_User::unsetMagicInCookie();
 		return true;