[PATCH] ui/dbus: forward guest clipboard grabs that lack a serial

[Rick Vernam <rtvernam@gmail.com>]

dbus_clipboard_update_info() drops any incoming grab whose
QemuClipboardInfo has no serial number:

    if (self_update || !info->has_serial) {
        return;
    }

For grabs coming from ui/vdagent.c, has_serial is only set when the
guest's vdagent client has negotiated VD_AGENT_CAP_CLIPBOARD_GRAB_SERIAL
(see vdagent_clipboard_recv_grab()). When the guest doesn't negotiate
it, the grab is silently dropped here and never forwarded to the
D-Bus display client via Clipboard.Grab.

It seems other protocols (ui/gtk-clipboard.c, ui/vnc-clipboard.c) do not
incorporate a validation on has_serial, so this patch matches their
behavior.

Signed-off-by: Rick Vernam <rtvernam@gmail.com>
---
 ui/dbus-clipboard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ui/dbus-clipboard.c b/ui/dbus-clipboard.c
index 90318384ee..1389ec0edc 100644
--- a/ui/dbus-clipboard.c
+++ b/ui/dbus-clipboard.c
@@ -72,7 +72,7 @@ dbus_clipboard_update_info(DBusDisplay *dpy, QemuClipboardInfo *info)
         return;
     }
 
-    if (self_update || !info->has_serial) {
+    if (self_update) {
         return;
     }
 
-- 
2.55.0