Merge tag 'fixes-20220318-pull-request' of git://git.kraxel.org/qemu into staging

bugfixes for vga, audio, vnc

# gpg: Signature made Fri 18 Mar 2022 13:56:22 GMT
# gpg:                using RSA key A0328CFFB93A17A79901FE7D4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* tag 'fixes-20220318-pull-request' of git://git.kraxel.org/qemu

:
  hw/display/vga: Report a proper error when adding a 2nd ISA VGA
  hw/display: Allow vga_common_init() to return errors
  hw/display/cirrus_vga: Clean up indentation in pci_cirrus_vga_realize()
  audio/mixeng: Do not declare unused variables
  ui: avoid unnecessary memory operations in vnc_refresh_server_surface()
  ui/gtk: Ignore 2- and 3-button press events

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>