Merge tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

Merge tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

UI: fixes for 8.2-rc1

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# gpg: Signature made Tue 21 Nov 2023 05:39:40 EST
# gpg:                using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5
# gpg:                issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* tag 'ui-pull-request' of https://gitlab.com/marcandre.lureau/qemu:
  ui/pixman-minimal.h: fix empty allocation
  vl: add missing display_remote++
  ui/console: fix default VC when there are no display
  ui: use "vc" chardev for dbus, gtk & spice-app
  vl: revert behaviour for -display none

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>