wined3d: Add UnregisterClass() on DLL_PROCESS_DETACH.

[Rico Schüller]

Hi,

this patch adds a call to UnregisterClass to release the associated data 
from the first (and all other) HINSTANCE1 of the dll. Otherwise the dll 
could crash after two more Free/Load-Library calls. This happens when it 
gets HINSTANCE2 and on the third load it gets HINSTANCE1 again. Now the 
dll uses the old data from the RegisterClass call from the first 
LoadLibrary call, which has overwritten data.

Cheers
Rico
---
  dlls/wined3d/directx.c         |    2 +-
  dlls/wined3d/wined3d_main.c    |    9 +++++----
  dlls/wined3d/wined3d_private.h |    3 +++
  3 files changed, 9 insertions(+), 5 deletions(-)


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