[1/4] wined3d: Don't allow a negative lock_count in buffer_Unmap.

[Rico Schüller]

Hi,

this patch adds a check in buffer_Unamp to not allow a negative 
lock_count, which will result in a broken return value on the next Map 
call to the same interface. This fixes bug 18824. The patches 2-4 are 
test cases for d3d8, d3d9 and ddraw.

Cheers
Rico

---
  dlls/wined3d/buffer.c |   10 ++++++++++
  1 files changed, 10 insertions(+), 0 deletions(-)


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