FIX:add "check_empty_project" api

jira: none
Change-Id: Ic0b0b558c8786749b1ac036b87dc08519002b17f
(cherry picked from commit 93d0c59ed0692b7cfa3a7684e5d18f3157d6f0e7)

src/slic3r/GUI/SyncAmsInfoDialog.hpp

@@ -169,6 +169,7 @@ protected:
     wxGridSizer *m_sizer_ams_mapping_right{nullptr};
 
 public:
+    void check_empty_project();
     void init_bind();
     void init_timer();
     void check_focus(wxWindow *window);