Partial patch from SF #452266, by Jason Petrone.

This changes Pythread_start_thread() to return the thread ID, or -1
for an error.  (It's technically an incompatible API change, but I
doubt anyone calls it.)
diff --git a/Python/thread_solaris.h b/Python/thread_solaris.h
index 66bdfa2..4c958b9 100644
--- a/Python/thread_solaris.h
+++ b/Python/thread_solaris.h
@@ -36,9 +36,10 @@
 }
 
 
-int 
+long
 PyThread_start_new_thread(void (*func)(void *), void *arg)
 {
+	thread_t tid;
 	struct func_arg *funcarg;
 	int success = 0;	/* init not needed when SOLARIS_THREADS and */
 				/* C_THREADS implemented properly */
@@ -50,12 +51,12 @@
 	funcarg->func = func;
 	funcarg->arg = arg;
 	if (thr_create(0, 0, new_func, funcarg,
-		       THR_DETACHED | THR_NEW_LWP, 0)) {
+		       THR_DETACHED | THR_NEW_LWP, &tid)) {
 		perror("thr_create");
 		free((void *) funcarg);
 		success = -1;
 	}
-	return success < 0 ? 0 : 1;
+	return tid;
 }
 
 long