spice: move spice_server_vm_{start,stop} calls into qemu_spice_display_*()

So calling spice server to start/stop the worker goes
hand in hand with the status variable update.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

ui/spice-core.c

@@ -623,9 +623,7 @@ static void vm_change_state_handler(void *opaque, int running,
 {
     if (running) {
         qemu_spice_display_start();
-        spice_server_vm_start(spice_server);
     } else {
-        spice_server_vm_stop(spice_server);
         qemu_spice_display_stop();
     }
 }
@@ -908,10 +906,12 @@ int qemu_spice_display_add_client(int csock, int skipauth, int tls)
 void qemu_spice_display_start(void)
 {
     spice_display_is_running = true;
+    spice_server_vm_start(spice_server);
 }
 
 void qemu_spice_display_stop(void)
 {
+    spice_server_vm_stop(spice_server);
     spice_display_is_running = false;
 }