- put the state pointer serializer in a virtual function so that types.cpp can operate without any knowledge of Doom states.

src/common/engine/serializer.cpp

@@ -445,6 +445,18 @@ FSerializer &FSerializer::Sprite(const char *key, int32_t &spritenum, int32_t *d
 	return *this;
 }
 
+//==========================================================================
+//
+// only here so that it can be virtually overridden. Without reference this cannot save anything.
+//
+//==========================================================================
+
+FSerializer& FSerializer::StatePointer(const char* key, void* ptraddr, bool *res)
+{
+	if (res) *res = false;
+	return *this;
+}
+
 //==========================================================================
 //
 //

src/common/engine/serializer.h

@@ -93,6 +93,9 @@ public:
 	FCompressedBuffer GetCompressedOutput();
 	// The sprite serializer is a special case because it is needed by the VM to handle its 'spriteid' type.
 	virtual FSerializer &Sprite(const char *key, int32_t &spritenum, int32_t *def);
+	// This is only needed by the type system.
+	virtual FSerializer& StatePointer(const char* key, void* ptraddr, bool *res);
+
 	FSerializer &StringPtr(const char *key, const char *&charptr);	// This only retrieves the address but creates no permanent copy of the string unlike the regular char* serializer.
 	FSerializer &AddString(const char *key, const char *charptr);
 	const char *GetString(const char *key);