d3d9: Declare some functions static.

dlls/d3d9/directx.c

@@ -213,7 +213,7 @@ ULONG WINAPI D3D9CB_DestroyRenderTarget(IWineD3DSurface *pSurface) {
     return IDirect3DSurface9_Release((IDirect3DSurface9*) surfaceParent);
 }
 
-HRESULT WINAPI D3D9CB_CreateAdditionalSwapChain(IUnknown *device,
+static HRESULT WINAPI D3D9CB_CreateAdditionalSwapChain(IUnknown *device,
                                                        WINED3DPRESENT_PARAMETERS* pPresentationParameters,
                                                        IWineD3DSwapChain ** ppSwapChain) {
     HRESULT res = D3D_OK;
@@ -308,8 +308,9 @@ ULONG WINAPI D3D9CB_DestroyDepthStencilSurface(IWineD3DSurface *pSurface) {
     return IDirect3DSurface9_Release((IDirect3DSurface9*) surfaceParent);
 }
 
-HRESULT  WINAPI  IDirect3D9Impl_CreateDevice(LPDIRECT3D9 iface, UINT Adapter, D3DDEVTYPE DeviceType, HWND hFocusWindow,
-                                            DWORD BehaviourFlags, D3DPRESENT_PARAMETERS* pPresentationParameters,
+static HRESULT WINAPI IDirect3D9Impl_CreateDevice(LPDIRECT3D9 iface, UINT Adapter, D3DDEVTYPE DeviceType,
+                                                  HWND hFocusWindow, DWORD BehaviourFlags,
+                                                  D3DPRESENT_PARAMETERS* pPresentationParameters,
                                                   IDirect3DDevice9** ppReturnedDeviceInterface) {
 
     IDirect3D9Impl       *This   = (IDirect3D9Impl *)iface;