Merge remote-tracking branch 'origin/master' into lh_avoid_crossing_perimeters

src/libslic3r/GCode.hpp

@@ -323,6 +323,7 @@ private:
     // Support for G-Code Processor
     float                               m_last_height{ 0.0f };
     float                               m_last_layer_z{ 0.0f };
+    float                               m_max_layer_z{ 0.0f };
 #if ENABLE_GCODE_VIEWER_DATA_CHECKING
     double                              m_last_mm3_per_mm;
     float                               m_last_width{ 0.0f };