qxl: allow QXL_IO_LOG also in vga

The driver may change us to vga mode and still issue a QXL_IO_LOG,
which we can easily support.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/qxl.c

diff --git a/hw/qxl.c b/hw/qxl.c
index 848c90f..0b9a4c7 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -943,6 +943,7 @@
     case QXL_IO_MEMSLOT_DEL:
     case QXL_IO_CREATE_PRIMARY:
     case QXL_IO_UPDATE_IRQ:
+    case QXL_IO_LOG:
         break;
     default:
         if (d->mode == QXL_MODE_NATIVE || d->mode == QXL_MODE_COMPAT)