bugfix: PyThread_start_new_thread() returns the thread ID, not a flag;

will backport.

Python/thread_os2.h

@@ -35,21 +35,18 @@ PyThread__init_thread(void)
 long
 PyThread_start_new_thread(void (*func)(void *), void *arg)
 {
-	int aThread;
-	int success = 0;
+	int thread_id;
 
-	aThread = _beginthread(func,
+	thread_id = _beginthread(func,
 				NULL,
 				OS2_STACKSIZE(_pythread_stacksize),
 				arg);
 
-	if (aThread == -1) {
-		success = -1;
-		fprintf(stderr, "aThread failed == %d", aThread);
+	if (thread_id == -1) {
 		dprintf(("_beginthread failed. return %ld\n", errno));
 	}
 
-	return success;
+	return thread_id;
 }
 
 long