Should have been fixed in commit 85be1e5e7b when we updated the library, but was... missed.
travis caught it after the fact at least.
README
This is small USB controlled LED blinking example program using libopencm3.
It's intended for the ST STM32-based Olimex STM32-H107 eval board. The usbtest.py script in this directory maybe used to control the LED.