qemu-thread: use pthread_equal

Fixes

qemu-thread.c: In function `qemu_thread_equal':
qemu-thread.c:161: error: invalid operands to binary ==

Use of pthread_equal suggested by Filip Navara.
Signed-off-by: NSebastian Herbszt <herbszt@gmx.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

qemu-thread.c

@@ -158,6 +158,6 @@ void qemu_thread_self(QemuThread *thread)
 
 int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2)
 {
-   return (thread1->thread == thread2->thread);
+   return pthread_equal(thread1->thread, thread2->thread);
 }