- added polyobject serializer.

- added sanity checks to prevent a savegame from being loaded with an incompatible map
- refactored a few things to simplify serialization.
- started work on main level serializer function.

src/serializer.cpp

@@ -534,6 +534,21 @@ FSerializer &FSerializer::StringPtr(const char *key, const char *&charptr)
 	return *this;
 }
 
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+unsigned FSerializer::GetSize(const char *group)
+{
+	if (isWriting()) return -1;	// we do not know this when writing.
+
+	const rapidjson::Value &val = r->mDocObj[group];
+	if (!val.IsArray()) return -1;
+	return val.Size();
+}
+
 //==========================================================================
 //
 // Writes out all collected objects