When trying to build libsass 0.14.5, I receive this error, the function causing this doesn't seem to be defined anywhere.

pysass.cpp: In function ‘PyObject* _to_py_value(const Sass_Value*)’:
pysass.cpp:71:32: error: ‘sass_list_get_is_bracketed’ was not declared in this scope
int is_bracketed = sass_list_get_is_bracketed(value);