Message 116288 - Python tracker

I've changed the function as you suggest, although there are in fact no failure detection semantics defined for PyThread_create_key().  See e.g. thread.c:294

/* Return a new key.  This must be called before any other functions in
 * this family, and callers must arrange to serialize calls to this
 * function.  No violations are detected.
 */
int
PyThread_create_key(void)