socket: poll compat fix

diff --git a/usual/socket.c b/usual/socket.c
index 77d961e965c460f455f94fb3517b7c1f66e650bd..1b9f6788a81ff793dda9e0ed05cd03beaf886f7f 100644 (file)
--- a/usual/socket.c
+++ b/usual/socket.c
@@ -278,8 +278,9 @@ static bool fdbuf_resize(struct fd_buf *buf, int fd)
        int alloc = sizeof(fd_set);
 
 #ifdef WIN32
+       int cnt = buf->set ? buf->set->fd_count : 0;
        /* win32 fd_set is array of handles, +8 for count&padding */
-       need_bytes = (buf->set->fd_count + 1) * sizeof(buf->set->fd_array[0]) + 8;
+       need_bytes = (cnt + 1) * sizeof(buf->set->fd_array[0]) + 8;
 #else
        /* otherwise, fd_set is bitmap, +8 for int/long alignment */
        need_bytes = fd / 8 + 8;