Error of type E_COMPILE_ERROR: switch statements can only contain one default clause

[bsoule]

Replicata:

1. install beeminder-ping plugin to a wordpress blog
2. configure it to send a +1 to a beeminder goal when you publish
3. publish a blog post

Expectata

Post gets published, and beeminder goal gets plus oned

Resultata

The wordpress site sends me an error message every time complaining about this line of the beeminder-php-api:

beeminder-php-api/lib/Beeminder/HttpDriver/Curl.php

Line 61 in 1f04ed4

default:

Error Details
=============
An error of type E_COMPILE_ERROR was caused in line 61 of the file /nas/content/live/beemblog/wp-content/plugins/beeminder-ping/vendor/beeminder-api/lib/Beeminder/HttpDriver/Curl.php. Error message: Switch statements may only contain one default clause