audio: remove abort() in audio_bug()

Commit ab32b78 "audio: Simplify audio_bug() removing old code"
introduced abort() in audio_bug() for regular builds.

audio_bug() was never meant to abort QEMU for the following
reasons.

  - There's code in audio_bug() that expects audio_bug() gets
    called more than once with error condition true. The variable
    'shown' is only 0 on first error.

  - All call sites test the return code of audio_bug(), print
    an error context message and handle the errror.

  - The abort() in audio_bug() enables a class of guest-triggered
    aborts similar to the Launchpad Bug #1910603 at
    https://bugs.launchpad.net/bugs/1910603.

Fixes: ab32b78 "audio: Simplify audio_bug() removing old code"
Buglink: https://bugs.launchpad.net/bugs/1910603
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20220917131626.7521-2-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

audio/audio.c

@@ -118,7 +118,6 @@ int audio_bug (const char *funcname, int cond)
             AUD_log (NULL, "I am sorry\n");
         }
         AUD_log (NULL, "Context:\n");
-        abort();
     }
 
     return cond;