server: Avoid accessing free'd thread pointers.

[Eric Pouech]

Alexandre Julliard wrote:

>Eric Pouech <eric.pouech at wanadoo.fr> writes:
>
>  
>
>>reading from wine/list.h
>>#define LIST_FOR_EACH_SAFE(cursor, cursor2, list) \
>>   for ((cursor) = (list)->next, (cursor2) = (cursor)->next; \
>>        (cursor) != (list); \
>>        (cursor) = (cursor2), (cursor2) = (cursor)->next)
>>
>>well, to me, the "(cursor2) = (cursor)->next" accesses cursor *AFTER*
>>it has been potentially freed
>>    
>>
>
>No, cursor has just been set to cursor2.
>
>  
>
/me scanning yellow pages for the nearest paper brown store
A+