Don't use g_thread_get_initialized.

Initialize glib threads unconditionally in main() instead
of using g_thread_get_initialized in the 9p code.

Fixes a build failure on RHEL-5, which ships glib 2.12.
g_thread_get_initialized was added in 2.20.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/9pfs/virtio-9p-coth.c

@@ -67,10 +67,6 @@ int v9fs_init_worker_threads(void)
     /* Leave signal handling to the iothread.  */
     pthread_sigmask(SIG_SETMASK, &set, &oldset);
 
-    /* init thread system if not already initialized */
-    if (!g_thread_get_initialized()) {
-        g_thread_init(NULL);
-    }
     if (qemu_pipe(notifier_fds) == -1) {
         ret = -1;
         goto err_out;

vl.c

@@ -2200,6 +2200,7 @@ int main(int argc, char **argv, char **envp)
     error_set_progname(argv[0]);
 
     g_mem_set_vtable(&mem_trace);
+    g_thread_init(NULL);
 
     init_clocks();