Make these definitions compatible with the other ambient size_t and
(u)intptr_t types used in the rest of our code base.
This partly reverts the corresponding typedef changes from wine commit
https://github.com/wine-mirror/wine/commit/d8ab5a14aac6d8f9dc493225e352a45784970003
"msvcrt: Use intptr_t or size_t instead of long where appropriate."