[Client] Avoid sending repeated ObjectDelete packets about an object

apps/openmw/mwscript/miscextensions.cpp

@@ -778,10 +778,14 @@ namespace MWScript
                             Start of tes3mp addition
 
                             Send an ID_OBJECT_DELETE packet every time an object is deleted
-                            through a script
+                            through a script, as long as we haven't already communicated
+                            a deletion for it
                         */
-                        if (mwmp::Main::get().getLocalPlayer()->isLoggedIn())
+                        if (mwmp::Main::get().getLocalPlayer()->isLoggedIn() &&
+                            ptr.getRefData().getLastCommunicatedState() != MWWorld::RefData::StateCommunication::Deleted)
                         {
+                            ptr.getRefData().setLastCommunicatedState(MWWorld::RefData::StateCommunication::Deleted);
+
                             mwmp::ObjectList *objectList = mwmp::Main::get().getNetworking()->getObjectList();
                             objectList->reset();
                             objectList->packetOrigin = ScriptController::getPacketOriginFromContextType(runtime.getContext().getContextType());

apps/openmw/mwworld/refdata.hpp

@@ -150,7 +150,8 @@ namespace MWWorld
             {
                 None = 0,
                 Enabled = 1,
-                Disabled = 2
+                Disabled = 2,
+                Deleted = 3
             };
 
         private: