Fix following warning:

...
cluster/corosync.c: In function ‘corosync_get_local_addr’:
cluster/corosync.c:132:22: warning: declaration of ‘sin’ shadows a global 
declaration [-Wshadow]
  CCLD   sheep
make[1]: Leaving directory `/home/test/sheepdog/sheep'
...

Signed-off-by: Liu Yuan <[email protected]>
---
 sheep/cluster/corosync.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sheep/cluster/corosync.c b/sheep/cluster/corosync.c
index f876112..b7fc025 100644
--- a/sheep/cluster/corosync.c
+++ b/sheep/cluster/corosync.c
@@ -129,7 +129,7 @@ static int corosync_get_local_addr(uint8_t *addr)
        int ret, nr;
        corosync_cfg_node_address_t caddr;
        struct sockaddr_storage *ss = (struct sockaddr_storage *)caddr.address;
-       struct sockaddr_in *sin = (struct sockaddr_in *)caddr.address;
+       struct sockaddr_in *sin4 = (struct sockaddr_in *)caddr.address;
        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)caddr.address;
        void *saddr;
 
@@ -149,7 +149,7 @@ static int corosync_get_local_addr(uint8_t *addr)
                saddr = &sin6->sin6_addr;
                memcpy(addr, saddr, 16);
        } else if (ss->ss_family == AF_INET) {
-               saddr = &sin->sin_addr;
+               saddr = &sin4->sin_addr;
                memset(addr, 0, 16);
                memcpy(addr + 12, saddr, 4);
        } else {
-- 
1.9.1

-- 
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