user32: Fix typedefs & function defn's so that the code compiles in visual C++ 2005

[Jeff Latimer]

broadcast.c did not compile under Visual C++ without this change.  The 
tests execute the same way under Wine and XP with the same three failures.

Jeff

---
  dlls/user32/tests/broadcast.c |    8 ++++----
  1 files changed, 4 insertions(+), 4 deletions(-)
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