audio: Let capture_callback handler use const buffer argument

The buffer is the captured input to pass to backends.
As we should not modify it, mark the argument const.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20200505132603.8575-3-f4bug@amsat.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/ui/vnc.c b/ui/vnc.c
index 1d7138a3a0..12a12714e1 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -1177,7 +1177,7 @@ static void audio_capture_destroy(void *opaque)
 {
 }
 
-static void audio_capture(void *opaque, void *buf, int size)
+static void audio_capture(void *opaque, const void *buf, int size)
 {
     VncState *vs = opaque;