Fix SWCommand add HelpRegisters

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -90,7 +90,7 @@ public abstract class SWCommand {
             addMapper(ClassMapper.class, method, i -> i == 0, false, TypeMapper.class, (anno, typeMapper) -> {
                 SWCommandUtils.addMapper(anno.value().getTypeName(), typeMapper);
             });
-            add(Register.class, method, i -> i > 2, true, null, (anno, parameters) -> {
+            add(Register.class, method, i -> i > 0, true, null, (anno, parameters) -> {
                 if (!anno.help()) {
                     return;
                 }