Tell the compiler to do a 32bit * 32bit -> 64bit multiplication
because period_ticks is a 64bit variable. The overflow occurs
for audio timer periods larger than 4294967us.

Fixes: be1092afa0 "audio: fix audio timer rate conversion bug"

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
---
 audio/audio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/audio/audio.c b/audio/audio.c
index 56fae55047..abea027fdf 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1738,7 +1738,7 @@ static AudioState *audio_init(Audiodev *dev, const char *name)
     if (dev->timer_period <= 0) {
         s->period_ticks = 1;
     } else {
-        s->period_ticks = dev->timer_period * SCALE_US;
+        s->period_ticks = dev->timer_period * (int64_t)SCALE_US;
     }
 
     e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
-- 
2.16.4