Core/Scripting: Fixed hotswap calling evade mode for dead creatures

src/server/game/Scripting/ScriptMgr.cpp

@@ -378,7 +378,8 @@ class CreatureGameObjectScriptRegistrySwapHooks
         ASSERT(!creature->IsCharmed(),
                "There is a disabled AI which is still loaded.");
 
-        creature->AI()->EnterEvadeMode();
+        if (creature->IsAlive())
+            creature->AI()->EnterEvadeMode();
     }
 
     static void UnloadDestroyScript(Creature* creature)