dxgi: Don't crash and just skip the tests if glX in not available.

dlls/dxgi/dxgi_main.c

@@ -97,6 +97,12 @@ HRESULT WINAPI CreateDXGIFactory(REFIID riid, void **factory)
 
     EnterCriticalSection(&dxgi_cs);
     object->wined3d = WineDirect3DCreate(10, (IUnknown *)object);
+    if(!object->wined3d)
+    {
+        hr = DXGI_ERROR_UNSUPPORTED;
+        LeaveCriticalSection(&dxgi_cs);
+        goto fail;
+    }
 
     object->adapter_count = IWineD3D_GetAdapterCount(object->wined3d);
     LeaveCriticalSection(&dxgi_cs);

dlls/dxgi/tests/device.c

@@ -33,7 +33,6 @@ static IDXGIDevice *create_device(HMODULE d3d10core)
     HRESULT hr;
 
     hr = CreateDXGIFactory(&IID_IDXGIFactory, (void *)&factory);
-    ok(SUCCEEDED(hr), "CreateDXGIFactory failed, hr %#x\n", hr);
     if (FAILED(hr)) goto cleanup;
 
     hr = IDXGIFactory_EnumAdapters(factory, 0, &adapter);