Make GetCurrentAIPackage return -1 for non-actors and dead actors

CHANGELOG.md

@@ -37,6 +37,7 @@
     Bug #6184: Command and Calm and Demoralize and Frenzy and Rally magic effects inconsistencies with vanilla
     Bug #6197: Infinite Casting Loop
     Bug #6273: Respawning NPCs rotation is inconsistent
+    Bug #6283: Avis Dorsey follows you after her death
     Bug #6289: Keyword search in dialogues expected the text to be all ASCII characters 
     Feature #2554: Modifying an object triggers the instances table to scroll to the corresponding record
     Feature #2780: A way to see current OpenMW version in the console

apps/openmw/mwscript/aiextensions.cpp

@@ -362,7 +362,15 @@ namespace MWScript
                 {
                     MWWorld::Ptr ptr = R()(runtime);
 
-                    const auto value = static_cast<Interpreter::Type_Integer>(ptr.getClass().getCreatureStats (ptr).getAiSequence().getLastRunTypeId());
+                    Interpreter::Type_Integer value = -1;
+                    if(ptr.getClass().isActor())
+                    {
+                        const auto& stats = ptr.getClass().getCreatureStats(ptr);
+                        if(!stats.isDead() || !stats.isDeathAnimationFinished())
+                        {
+                            value = static_cast<Interpreter::Type_Integer>(stats.getAiSequence().getLastRunTypeId());
+                        }
+                    }
 
                     runtime.push (value);
                 }