Add GetExtraFlags

CreatureMethods.h

@@ -864,6 +864,24 @@ auto const& threatlist = creature->getThreatManager().getThreatList();
         return 1;
     }
 
+    /**
+     * Returns the [Creature]'s Extra flags.
+     *
+     * These are used to control whether the NPC is a civilian, uses pathfinding,
+     *   if it's a guard, etc.
+     *
+     * @return [ExtraFlags] extraFlags
+     */
+    int GetExtraFlags(lua_State* L, Creature* creature)
+    {
+#if defined(TRINITY) || defined(AZEROTHCORE)
+        Eluna::Push(L, creature->GetCreatureTemplate()->flags_extra);
+#else
+        Eluna::Push(L, creature->GetCreatureInfo()->ExtraFlags);
+#endif
+        return 1;
+    }
+
 #if defined(CLASSIC) || defined(TBC) || defined(WOTLK)
     /**
      * Returns the [Creature]'s shield block value.

LuaFunctions.cpp

@@ -782,6 +782,9 @@ ElunaRegister<Creature> CreatureMethods[] =
     { "GetLootRecipient", &LuaCreature::GetLootRecipient },
     { "GetLootRecipientGroup", &LuaCreature::GetLootRecipientGroup },
     { "GetNPCFlags", &LuaCreature::GetNPCFlags },
+#if defined(TRINITY) || defined(AZEROTHCORE)
+    { "GetExtraFlags", &LuaCreature::GetNPCFlags },
+#endif
 #if defined(CLASSIC) || defined(TBC) || defined(WOTLK)
     { "GetShieldBlockValue", &LuaCreature::GetShieldBlockValue },
 #endif