Make pulse_ext_callback const

We can make our instance of snd_ctl_ext_callback_t const without any problems,
so let's do it.

diff --git a/pulse/ctl_pulse.c b/pulse/ctl_pulse.c
index 91e9d66a8155ef01b9dbc6b58bd23943ea0135e8..61ec01f25fcce4a0bd8b3094510e1f46f19a8ff8 100644 (file)
--- a/pulse/ctl_pulse.c
+++ b/pulse/ctl_pulse.c
@@ -592,7 +592,7 @@ static void pulse_close(snd_ctl_ext_t * ext)
        free(ctl);
 }
 
-static snd_ctl_ext_callback_t pulse_ext_callback = {
+static const snd_ctl_ext_callback_t pulse_ext_callback = {
        .elem_count = pulse_elem_count,
        .elem_list = pulse_elem_list,
        .find_elem = pulse_find_elem,