Jacek Caban : wininet: Fixed crash in chunked_read if netconn is not available.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7d8c8af9d71dc8ecf6a07ec19dfbc0deb108f8e4
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=7d8c8af9d71dc8ecf6a07ec19d...

Author: Jacek Caban <jacek(a)codeweavers.com>
Date:   Thu Mar  7 16:32:43 2013 +0100

wininet: Fixed crash in chunked_read if netconn is not available.

---

 dlls/wininet/http.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/wininet/http.c b/dlls/wininet/http.c
index 8fec2a4..890adce 100644
--- a/dlls/wininet/http.c
+++ b/dlls/wininet/http.c
@@ -2643,7 +2643,7 @@ static DWORD chunked_read(data_stream_t *stream, http_request_t *req, BYTE *buf,
             if(read_mode == READMODE_NOBLOCK) {
                 DWORD avail;
 
-                if(!NETCON_query_data_available(req->netconn, &avail) || !avail)
+                if(!req->netconn || !NETCON_query_data_available(req->netconn, &avail) || !avail)
                     break;
                 if(read_bytes > avail)
                     read_bytes = avail;