PATCH: Get rid of superfluous dup() and close() calls.

[Shachar Shemesh]

Alexandre Julliard wrote:

>... and it's better to risk an fd leak than to risk invalidating the
>cached value in case someone closes the fd when they shouldn't.
>  
>
I'm not sure I agree. When someone closes a fd they shouldn't, that 
would lead to program crashing, and attention being brought to the 
problem. When someone leaks a fd, noone will notice.

            Shachar