[WINED3D 2] Fix render state bugs

[Ivan Gyurdiev]

> Bug:  Do not always create a depth-stencil buffer (thereby forcing 
> ZENABLE state to TRUE always). Dereference 
> pPresentationParameters->EnableAutoDepthStencil pointer.
I see this one broke Uninit3D, because it always attempts to free the 
depthStencilBuffer, even when there isn't one.
As a result tests fail. Please re-try with the attached patch.




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 dlls/wined3d/device.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index a92681c..2179cc9 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -2118,12 +2118,14 @@ static HRESULT WINAPI IWineD3DDeviceImpl
     TRACE("Setting rendertarget to NULL\n");
     This->renderTarget = NULL;
 
-    IWineD3DSurface_GetParent(This->depthStencilBuffer, &stencilBufferParent);
-    IUnknown_Release(stencilBufferParent);          /* once for the get parent */
-    if(IUnknown_Release(stencilBufferParent)  >0){  /* the second time for when it was created */
-        FIXME("(%p) Something's still holding the depthStencilBuffer\n",This);
+    if (This->depthStencilBuffer) {
+        IWineD3DSurface_GetParent(This->depthStencilBuffer, &stencilBufferParent);
+        IUnknown_Release(stencilBufferParent);          /* once for the get parent */
+        if(IUnknown_Release(stencilBufferParent)  >0){  /* the second time for when it was created */
+            FIXME("(%p) Something's still holding the depthStencilBuffer\n",This);
+        }
+        This->depthStencilBuffer = NULL;
     }
-    This->depthStencilBuffer = NULL;
 
     for(i=0; i < This->NumberOfSwapChains; i++) {
         TRACE("Releasing the implicit swapchain %d\n", i);
-- 
1.4.0