audio: Require AudioState in AUD_add_capture

Since all callers require a valid audiodev this function can now safely
abort in case of missing AudioState.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Message-ID: <c6e87e678e914df0f59da2145c2753cdb4a16f63.1650874791.git.mkletzan@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

audio/audio.c

@@ -1876,10 +1876,8 @@ CaptureVoiceOut *AUD_add_capture(
     struct capture_callback *cb;
 
     if (!s) {
-        if (!legacy_config) {
-            dolog("Capturing without setting an audiodev is deprecated\n");
-        }
-        s = audio_init(NULL, NULL);
+        error_report("Capturing without setting an audiodev is not supported");
+        abort();
     }
 
     if (!audio_get_pdo_out(s->dev)->mixing_engine) {