Fix warning on WIN32

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

block/raw-win32.c

diff --git a/block/raw-win32.c b/block/raw-win32.c
index ab3abd6..15f3ec4 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -388,7 +388,6 @@
 {
     bdrv_register(&bdrv_raw);
     bdrv_register(&bdrv_host_device);
-    return 0;
 }
 
 block_init(bdrv_raw_init);