Simple preheat, temperary solution

src/libslic3r/GCode/WipeTower2.hpp

@@ -255,6 +255,8 @@ private:
     // Goes through m_plan, calculates border and finish_layer extrusions and subtracts them from last wipe
     void save_on_last_wipe();
 
+	// Orca: temp help function to set temperature
+    std::string set_preheat_temperature(unsigned int temperature, bool wait, int tool);
 
     // to store information about tool changes for a given layer
 	struct WipeTowerInfo{