wininet: ensure null check before dereference

[James Hawkins]

On 1/1/07, Jeff Latimer <lats at yless4u.com.au> wrote:
> Coverity cid: 367 Do the null check before the dereference.  Given that
> this is an simple internal function, do we need to check for null pointers?
>

Generally we don't check for NULL params in internal functions.

-- 
James Hawkins