Codechange: Remove CCountedPtr.

This was originally generic and used by YAPF, but now it is used only by script objects.

CCountedPtr provided much more (untested) functionality than used.

ScriptObjectRef already exists for script objects and does the same thing, so use this instead.

src/script/api/script_object.hpp

@@ -10,7 +10,6 @@
 #ifndef SCRIPT_OBJECT_HPP
 #define SCRIPT_OBJECT_HPP
 
-#include "../../misc/countedptr.hpp"
 #include "../../road_type.h"
 #include "../../rail_type.h"
 #include "../../string_func.h"
@@ -34,6 +33,27 @@ typedef bool (ScriptModeProc)();
  */
 typedef bool (ScriptAsyncModeProc)();
 
+/**
+ * Simple counted object. Use it as base of your struct/class if you want to use
+ *  basic reference counting. Your struct/class will destroy and free itself when
+ *  last reference to it is released (using Release() method). The initial reference
+ *  count (when it is created) is zero (don't forget AddRef() at least one time if
+ *  not using ScriptObjectRef.
+ * @api -all
+ */
+class SimpleCountedObject {
+public:
+	SimpleCountedObject() : ref_count(0) {}
+	virtual ~SimpleCountedObject() {}
+
+	inline void AddRef() { ++this->ref_count; }
+	void Release();
+	virtual void FinalRelease() {};
+
+private:
+	int32_t ref_count;
+};
+
 /**
  * Uper-parent object of all API classes. You should never use this class in
  *   your script, as it doesn't publish any public functions. It is used
@@ -406,7 +426,7 @@ public:
 	 */
 	ScriptObjectRef(T *data) : data(data)
 	{
-		this->data->AddRef();
+		if (this->data != nullptr) this->data->AddRef();
 	}
 
 	/* No copy constructor. */