Merge pull request #4199 from lrpirlet/G28_X_drills_a_hole_in_printed_part

apply correction when swtiching from MBL to physical in G28 X

Marlin/Marlin_main.cpp

@@ -2770,6 +2770,7 @@ inline void gcode_G28() {
                                 current_position[Y_AXIS] - home_offset[Y_AXIS]);
       }
       mbl.set_active(false);
+      current_position[Z_AXIS] = pre_home_z;
     }
   #endif