finish PreDelete and CheckPreDeletion. now there is no problem when deleting object

LibCmo/CK2/MgrImpls/CKObjectManager.cpp

@@ -97,7 +97,7 @@ namespace LibCmo::CK2::MgrImpls {
 			// add into list
 			validObjIds.emplace_back(ids[i]);
 		}
-		
+
 		// then remove deleted object from m_ObjectListByClass
 		// because we have set to be deleted flag.
 		for (size_t i = 0; i < m_ObjectsListByClass.size(); ++i) {
@@ -117,6 +117,11 @@ namespace LibCmo::CK2::MgrImpls {
 			}
 		}
 
+		// calling PreDelete function for deleted objects
+		for (const auto& objid : validObjIds) {
+			m_ObjectsList[Id2Offset(objid)]->PreDelete();
+		}
+
 		// then free all valid object
 		for (const auto& objid : validObjIds) {
 			CKDWORD off = Id2Offset(objid);