ui: add getter for UIInfo

The following patch is going to introduce extra fields / details to
UIInfo. Add a getter and keep the current values, instead of memset(0)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20200927145751.365446-4-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

include/ui/console.h

@@ -264,6 +264,7 @@ void update_displaychangelistener(DisplayChangeListener *dcl,
 void unregister_displaychangelistener(DisplayChangeListener *dcl);
 
 bool dpy_ui_info_supported(QemuConsole *con);
+const QemuUIInfo *dpy_get_ui_info(const QemuConsole *con);
 int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info);
 
 void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h);

ui/console.c

@@ -1516,6 +1516,13 @@ bool dpy_ui_info_supported(QemuConsole *con)
     return con->hw_ops->ui_info != NULL;
 }
 
+const QemuUIInfo *dpy_get_ui_info(const QemuConsole *con)
+{
+    assert(con != NULL);
+
+    return &con->ui_info;
+}
+
 int dpy_set_ui_info(QemuConsole *con, QemuUIInfo *info)
 {
     assert(con != NULL);

ui/spice-display.c

@@ -672,7 +672,7 @@ static int interface_client_monitors_config(QXLInstance *sin,
         return 1;
     }
 
-    memset(&info, 0, sizeof(info));
+    info = *dpy_get_ui_info(ssd->dcl.con);
 
     if (mc->num_of_monitors == 1) {
         /*