Core/Movement: Add LOS check for fleeingmovement target point.

Prevents fleeing or feared units from going to upper floor ignoring walls/ceilings with mmaps on(and usually get stucked).

Current implementation just randomly selects a distance and angle against the frighting unit, when in narrow circumstance such as underground caves, such targeting point would be at another floor.

Closes #11300
Ref #9475 (needs fixed confirmation)

src/server/scripts/EasternKingdoms/ZulAman/boss_akilzon.cpp

@@ -228,7 +228,7 @@ class boss_akilzon : public CreatureScript
                         case EVENT_STATIC_DISRUPTION:
                             {
                             Unit* target = SelectTarget(SELECT_TARGET_RANDOM, 1);
-                            if (!target) 
+                            if (!target)
                                 target = me->GetVictim();
                             if (target)
                             {
@@ -244,7 +244,7 @@ class boss_akilzon : public CreatureScript
                         case EVENT_GUST_OF_WIND:
                             {
                                 Unit* target = SelectTarget(SELECT_TARGET_RANDOM, 1);
-                                if (!target) 
+                                if (!target)
                                     target = me->GetVictim();
                                 if (target)
                                     DoCast(target, SPELL_GUST_OF_WIND);

src/server/scripts/Northrend/ChamberOfAspects/ObsidianSanctum/boss_sartharion.cpp

@@ -467,7 +467,7 @@ public:
                         CallDragon(DATA_TENEBRON);
                         break;
                     case EVENT_CALL_SHADRON:
-                        CallDragon(DATA_SHADRON);    
+                        CallDragon(DATA_SHADRON);
                         break;
                     case EVENT_CALL_VESPERON:
                         CallDragon(DATA_VESPERON);

src/server/scripts/Northrend/Nexus/Nexus/boss_ormorok.cpp

@@ -195,8 +195,8 @@ public:
 
     struct npc_crystal_spike_triggerAI : public ScriptedAI
     {
-        npc_crystal_spike_triggerAI(Creature* creature) : ScriptedAI(creature) 
-        { 
+        npc_crystal_spike_triggerAI(Creature* creature) : ScriptedAI(creature)
+        {
             _count = 0;
             _despawntimer = 0;
         }

src/server/scripts/Northrend/zone_borean_tundra.cpp

@@ -428,8 +428,8 @@ public:
 
     struct npc_jennyAI : public ScriptedAI
     {
-        npc_jennyAI(Creature* creature) : ScriptedAI(creature) 
-        { 
+        npc_jennyAI(Creature* creature) : ScriptedAI(creature)
+        {
             setCrateNumber = false;
         }
 

src/server/scripts/Outland/zone_blades_edge_mountains.cpp

@@ -1125,7 +1125,7 @@ public:
 
     struct npc_oscillating_frequency_scanner_master_bunnyAI : public ScriptedAI
     {
-        npc_oscillating_frequency_scanner_master_bunnyAI(Creature* creature) : ScriptedAI(creature) 
+        npc_oscillating_frequency_scanner_master_bunnyAI(Creature* creature) : ScriptedAI(creature)
         {
             playerGuid = 0;
         }

src/server/scripts/Pet/pet_dk.cpp

@@ -54,7 +54,7 @@ class npc_pet_dk_ebon_gargoyle : public CreatureScript
                 uint64 ownerGuid = me->GetOwnerGUID();
                 if (!ownerGuid)
                     return;
-                
+
                 // Find victim of Summon Gargoyle spell
                 std::list<Unit*> targets;
                 Trinity::AnyUnfriendlyUnitInObjectRangeCheck u_check(me, me, 30.0f);