mozilla/webvtt — pull request #18 by caitp (2013-02-01 15:36:01+00:00)
Title: webvtt_create_string doesn't initialize refcounts

Based on a valgrind warning, it looks like webvtt_create_string() should be initializing the new string's refcount, just like string_detach(). Otherwise the code appears to be depending on the platform to initialize the count to zero.