Distinct runout states (#19965)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/gcode/feature/pause/M600.cpp

@@ -88,7 +88,7 @@ void GcodeSuite::M600() {
                               // In this case, for duplicating modes set DXC_ext to the extruder that ran out.
       #if HAS_FILAMENT_SENSOR && NUM_RUNOUT_SENSORS > 1
         if (idex_is_duplicating())
-          DXC_ext = (READ(FIL_RUNOUT2_PIN) == FIL_RUNOUT_STATE) ? 1 : 0;
+          DXC_ext = (READ(FIL_RUNOUT2_PIN) == FIL_RUNOUT2_STATE) ? 1 : 0;
       #else
         DXC_ext = active_extruder;
       #endif