d3d10core: dxgi_format_from_wined3dformat should return DXGI_FORMAT enum values in all cases.

dlls/d3d10core/utils.c

@@ -242,7 +242,7 @@ DXGI_FORMAT dxgi_format_from_wined3dformat(enum wined3d_format_id format)
         case WINED3DFMT_B8G8R8X8_UNORM: return DXGI_FORMAT_B8G8R8X8_UNORM;
         default:
             FIXME("Unhandled wined3d format %#x.\n", format);
-            return WINED3DFMT_UNKNOWN;
+            return DXGI_FORMAT_UNKNOWN;
     }
 }