Core/SAI: Fix static analysis issue

Initialize uninitialized value, move class field from public to private.

(cherry picked from commit 7dc97c035350f9505a9fba0b8ec2d2037044e586)

src/server/game/AI/SmartScripts/SmartAI.cpp

@@ -32,7 +32,7 @@
 SmartAI::SmartAI(Creature* creature) : CreatureAI(creature), mIsCharmed(false), mFollowCreditType(0), mFollowArrivedTimer(0), mFollowCredit(0), mFollowArrivedEntry(0), mFollowDist(0.f), mFollowAngle(0.f),
     _escortState(SMART_ESCORT_NONE), _escortNPCFlags(0), _escortInvokerCheckTimer(1000), _currentWaypointNode(0), _waypointReached(false), _waypointPauseTimer(0), _waypointPauseForced(false), _repeatWaypointPath(false),
     _OOCReached(false), _waypointPathEnded(false), mRun(true), mEvadeDisabled(false), mCanAutoAttack(true), mCanCombatMove(true), mInvincibilityHpLevel(0), mDespawnTime(0), mDespawnState(0), mJustReset(false),
-    mConditionsTimer(0), _gossipReturn(false)
+    mConditionsTimer(0), _gossipReturn(false), mEscortQuestID(0)
 {
     mHasConditions = sConditionMgr->HasConditionsForNotGroupedEntry(CONDITION_SOURCE_TYPE_CREATURE_TEMPLATE_VEHICLE, creature->GetEntry());
 }

src/server/game/AI/SmartScripts/SmartAI.h

@@ -181,8 +181,6 @@ class TC_GAME_API SmartAI : public CreatureAI
         void QuestReward(Player* player, Quest const* quest, uint32 opt) override;
         void OnGameEvent(bool start, uint16 eventId) override;
 
-        uint32 mEscortQuestID;
-
         void SetDespawnTime (uint32 t, uint32 r = 0)
         {
             mDespawnTime = t;
@@ -198,6 +196,8 @@ class TC_GAME_API SmartAI : public CreatureAI
 
         void SetGossipReturn(bool val) { _gossipReturn = val; }
 
+        void SetEscortQuest(uint32 questID) { mEscortQuestID = questID; }
+
     private:
         bool AssistPlayerInCombatAgainst(Unit* who);
         void ReturnToLastOOCPos();
@@ -246,6 +246,8 @@ class TC_GAME_API SmartAI : public CreatureAI
 
         // Gossip
         bool _gossipReturn;
+
+        uint32 mEscortQuestID;
 };
 
 class TC_GAME_API SmartGameObjectAI : public GameObjectAI

src/server/game/AI/SmartScripts/SmartScript.cpp

@@ -1353,7 +1353,7 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
 
             uint32 quest = e.action.wpStart.quest;
             uint32 DespawnTime = e.action.wpStart.despawnTime;
-            ENSURE_AI(SmartAI, me->AI())->mEscortQuestID = quest;
+            ENSURE_AI(SmartAI, me->AI())->SetEscortQuest(quest);
             ENSURE_AI(SmartAI, me->AI())->SetDespawnTime(DespawnTime);
             break;
         }