wininet: Don't call DeleteSecurityContext and FreeCredentialsHandle on invalid handles.

[Robert Shearman]

---
  dlls/wininet/http.c |   12 ++++++++----
  1 files changed, 8 insertions(+), 4 deletions(-)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 6d9b5604f5e7e1bbbffcd1aa1908d2347fe3e9b5.diff
Type: text/x-patch
Size: 1394 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20080310/0590c792/attachment.bin