coreaudio: rename misnamed variable fake_as

While the variable once was used to fake audio settings, since
commit ed2a4a79 "audio: proper support for float samples in
mixeng" this is no longer true. Rename the variable to obt_as.
This is the same naming scheme as in audio/sdlaudio.c

Tested-by: Howard Spoelstra <hsp.cat7@gmail.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-id: 20201213130528.5863-1-vr_qemu@t-online.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

audio/coreaudio.c

@@ -482,7 +482,7 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
     Audiodev *dev = drv_opaque;
     AudiodevCoreaudioPerDirectionOptions *cpdo = dev->u.coreaudio.out;
     int frames;
-    struct audsettings fake_as;
+    struct audsettings obt_as;
 
     /* create mutex */
     err = pthread_mutex_init(&core->mutex, NULL);
@@ -491,8 +491,8 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
         return -1;
     }
 
-    fake_as = *as;
-    as = &fake_as;
+    obt_as = *as;
+    as = &obt_as;
     as->fmt = AUDIO_FORMAT_F32;
     audio_pcm_init_info (&hw->info, as);