oslib-posix：Fix handle fd leak in qemu_write_pidfile()

[AlexChen]

From: alexchen <alex.chen@huawei.com>

The fd will leak when (a.st_ino == b.st_ino) is true, fix it.

Signed-off-by: AlexChen <alex.chen@huawei.com>
---
 util/oslib-posix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/util/oslib-posix.c b/util/oslib-posix.c
index ad8001a4ad..74cf5e9c73 100644
--- a/util/oslib-posix.c
+++ b/util/oslib-posix.c
@@ -176,6 +176,7 @@ bool qemu_write_pidfile(const char *path, Error **errp)
         goto fail_unlink;
     }

+    close(fd);
     return true;

 fail_unlink:
-- 
2.19.1