[Server] Add OnActorCellChange script callback

apps/openmw-mp/Script/ScriptFunctions.hpp

@@ -125,6 +125,7 @@ public:
             {"OnPlayerSpellbookChange",  Function<void, unsigned short>()},
             {"OnPlayerJournalChange",    Function<void, unsigned short>()},
             {"OnActorList",              Function<void, unsigned short, const char*>()},
+            {"OnActorCellChange",        Function<void, unsigned short, const char*>()},
             {"OnActorTest",              Function<void, unsigned short, const char*>()},
             {"OnObjectPlace",            Function<void, unsigned short, const char*>()},
             {"OnObjectDelete",           Function<void, unsigned short, const char*>()},

apps/openmw-mp/processors/actor/ProcessorActorCellChange.hpp

@@ -17,6 +17,8 @@ namespace mwmp
         {
             // Send this to everyone
             packet.Send(true);
+
+            Script::Call<Script::CallbackIdentity("OnActorCellChange")>(player.getId(), actorList.cell.getDescription().c_str());
         }
     };
 }