[PATCH v3 18/22] hw/virtio: fix -Werror=maybe-uninitialized

[marcandre . lureau]

From: Marc-André Lureau <marcandre.lur...@redhat.com>

../hw/virtio/vhost-shadow-virtqueue.c:545:13: error: ‘r’ may be used 
uninitialized [-Werror=maybe-uninitialized]

Set `r` to 0 at every loop, since we don't check vhost_svq_get_buf()
return value.

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
 hw/virtio/vhost-shadow-virtqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/virtio/vhost-shadow-virtqueue.c 
b/hw/virtio/vhost-shadow-virtqueue.c
index fc5f408f77..3b2beaea24 100644
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -526,10 +526,10 @@ static void vhost_svq_flush(VhostShadowVirtqueue *svq,
 size_t vhost_svq_poll(VhostShadowVirtqueue *svq, size_t num)
 {
     size_t len = 0;
-    uint32_t r;
 
     while (num--) {
         int64_t start_us = g_get_monotonic_time();
+        uint32_t r = 0;
 
         do {
             if (vhost_svq_more_used(svq)) {
-- 
2.45.2.827.g557ae147e6