[RFC PATCH 02/14] chardev/char: Explicit we ignore some 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:

  chardev/char.c: In function ‘qemu_chr_be_event’:
  chardev/char.c:65:5: error: enumeration value ‘CHR_EVENT_BREAK’ not handled in switch [-Werror=switch]
     65 |     switch (event) {
        |     ^~~~~~
  chardev/char.c:65:5: error: enumeration value ‘CHR_EVENT_MUX_IN’ not handled in switch [-Werror=switch]
  chardev/char.c:65:5: 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: "Marc-André Lureau" <marcandre.lureau@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
---
 chardev/char.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/chardev/char.c b/chardev/char.c
index 7b6b2cb123..c4b6bbc55a 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -69,6 +69,9 @@ void qemu_chr_be_event(Chardev *s, int event)
         case CHR_EVENT_CLOSED:
             s->be_open = 0;
             break;
+    default:
+        /* Ignore */
+        break;
     }
 
     CHARDEV_GET_CLASS(s)->chr_be_event(s, event);
-- 
2.21.0