wined3d: Get rid of client_memory from wineD3DSurface_DIB.

dlls/wined3d/surface.c

@@ -4800,14 +4800,6 @@ void flip_surface(struct wined3d_surface *front, struct wined3d_surface *back)
         back->pbo = tmp_pbo;
     }
 
-    /* client_memory should not be different, but just in case */
-    {
-        BOOL tmp;
-        tmp = front->dib.client_memory;
-        front->dib.client_memory = back->dib.client_memory;
-        back->dib.client_memory = tmp;
-    }
-
     /* Flip the opengl texture */
     {
         GLuint tmp;

dlls/wined3d/swapchain.c

@@ -787,14 +787,6 @@ static HRESULT swapchain_gdi_present(struct wined3d_swapchain *swapchain, const
             ERR("GDI Surface %p has heap memory allocated.\n", back);
     }
 
-    /* Client_memory should not be different, but just in case. */
-    {
-        BOOL tmp;
-        tmp = front->dib.client_memory;
-        front->dib.client_memory = back->dib.client_memory;
-        back->dib.client_memory = tmp;
-    }
-
     /* FPS support */
     if (TRACE_ON(fps))
     {

dlls/wined3d/wined3d_private.h

@@ -1949,7 +1949,6 @@ typedef struct wineD3DSurface_DIB {
     HBITMAP DIBsection;
     void* bitmap_data;
     UINT bitmap_size;
-    BOOL client_memory;
 } wineD3DSurface_DIB;
 
 struct wined3d_renderbuffer_entry