Fix IDEX homing X0 wrong direction (#12200)

Marlin/src/module/stepper.cpp

           #endif
       ) {
         last_direction_bits = current_block->direction_bits;
-        set_directions();
         #if EXTRUDERS > 1
           last_moved_extruder = stepper_extruder;
         #endif
+        set_directions();
       }
 
       // At this point, we must ensure the movement about to execute isn't