Fix M115 cap with EXTRUDERS == 0 (#16459)

Author: vector76

Marlin/src/gcode/host/M115.cpp

@@ -152,7 +152,7 @@ void GcodeSuite::M115() {
 
     // THERMAL_PROTECTION
     cap_line(PSTR("THERMAL_PROTECTION")
-      #if ENABLED(THERMAL_PROTECTION_HOTENDS) && (ENABLED(THERMAL_PROTECTION_BED) || !HAS_HEATED_BED) && (ENABLED(THERMAL_PROTECTION_CHAMBER) || !HAS_HEATED_CHAMBER)
+      #if (ENABLED(THERMAL_PROTECTION_HOTENDS) || !EXTRUDERS) && (ENABLED(THERMAL_PROTECTION_BED) || !HAS_HEATED_BED) && (ENABLED(THERMAL_PROTECTION_CHAMBER) || !HAS_HEATED_CHAMBER)
         , true
       #endif
     );