fix summator module

modules/summator/SCsub

@@ -0,0 +1,6 @@
+# SCsub
+#!/usr/bin/env python
+
+Import('env')
+
+env.add_source_files(env.modules_sources, "*.cpp") # Add all cpp files to the build

modules/summator/register_types.cpp

@@ -0,0 +1,19 @@
+/* register_types.cpp */
+
+#include "register_types.h"
+
+#include "core/object/class_db.h"
+#include "summator.h"
+
+void initialize_summator_module(ModuleInitializationLevel p_level) {
+    if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
+        return;
+    }
+    ClassDB::register_class<Summator>();
+}
+
+void uninitialize_summator_module(ModuleInitializationLevel p_level) {
+    if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
+        return;
+    }
+}