[RFC PATCH 12/14] vhost-user-blk: Explicit we ignore few QEMUChrEvent in IOEventHandler

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

The Chardev events are listed in the QEMUChrEvent enum. To be
able to use this enum in the IOEventHandler typedef, we need to
explicit when frontends ignore some events, to silent GCC the
following warnings:

    CC      s390x-softmmu/hw/block/vhost-user-blk.o
  hw/block/vhost-user-blk.c: In function ‘vhost_user_blk_event’:
  hw/block/vhost-user-blk.c:370:5: error: enumeration value ‘CHR_EVENT_BREAK’ not handled in switch [-Werror=switch]
    370 |     switch (event) {
        |     ^~~~~~
  hw/block/vhost-user-blk.c:370:5: error: enumeration value ‘CHR_EVENT_MUX_IN’ not handled in switch [-Werror=switch]
  hw/block/vhost-user-blk.c:370:5: error: enumeration value ‘CHR_EVENT_MUX_OUT’ not handled in switch [-Werror=switch]
  cc1: all warnings being treated as errors

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: qemu-block@nongnu.org
---
 hw/block/vhost-user-blk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index 63da9bb619..4e2b2efdd3 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -383,6 +383,9 @@ static void vhost_user_blk_event(void *opaque, int event)
             s->watch = 0;
         }
         break;
+    default:
+        /* Ignore */
+        break;
     }
 }
 
-- 
2.21.0