(d3d_ctx.cpp) Use set_title function

gfx/drivers_context/d3d_ctx.cpp

@@ -79,13 +79,12 @@ static void gfx_ctx_d3d_update_title(void *data)
    char buf[128]        = {0};
    char buffer_fps[128] = {0};
    settings_t *settings = config_get_ptr();
-   HWND         window  = win32_get_window();
 
    if (video_monitor_get_fps(buf, sizeof(buf),
             buffer_fps, sizeof(buffer_fps)))
    {
 #ifndef _XBOX
-      SetWindowText(window, buf);
+      ui_window_win32_set_title(&main_window, buf);
 #endif
    }