Please describe the problem:
xmlNewRMutex() initializes a pthread mutex, and a pthread condvar. The
xmlFreeRMutex() only destroys the mutex, but not the condvar.


Steps to reproduce:
for (;;) {
    xmlFreeRMutex(xmlNewRMutex());
}


Actual results:
You'll eventually run out of memory or address space.

Expected results:
You'd not run out of memory or address space :-)

Does this happen every time?
Yes.

Other information:
Easy fix is to add pthread_cond_destroy() into xmlFreeRMutex.