ui: rename cursor_{put->unref}

The naming is more conventional in QEMU.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 16802f9..243a794 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -464,7 +464,7 @@
         qemu_mutex_unlock(&ssd->lock);
         dpy_cursor_define(ssd->dcl.con, c);
         qemu_mutex_lock(&ssd->lock);
-        cursor_put(c);
+        cursor_unref(c);
     }
 
     if (ssd->mouse_x != -1 && ssd->mouse_y != -1) {
@@ -766,7 +766,7 @@
 
     qemu_mutex_lock(&ssd->lock);
     cursor_get(c);
-    cursor_put(ssd->cursor);
+    cursor_unref(ssd->cursor);
     ssd->cursor = c;
     ssd->hot_x = c->hot_x;
     ssd->hot_y = c->hot_y;