Scripts/BWD: improved range target check for Poison Bombs

* make Poison Bombs taunt immune
* added currency loot to Omnotron Defense system

sql/updates/world/custom/custom_2019_05_18_00_world.sql

@@ -0,0 +1,11 @@
+UPDATE `creature_template` SET `flags_extra`= 0x00000100 WHERE `entry` IN (42897, 49121, 49122, 49123);
+UPDATE `creature_template` SET `flags_extra` = `flags_extra` | 1 WHERE `entry` IN (42180, 49050, 49051, 49052);
+UPDATE `creature_template` SET `flags_extra` = `flags_extra` | 0x00200000 WHERE `entry` IN (42180, 49050, 49051, 49052, 42178, 49053, 49054, 49055, 42179, 49047, 49048, 49040, 42166, 49056, 49057, 49058);
+
+-- Currency Loot
+DELETE FROM `creature_onkill_reward` WHERE `creature_id` IN (42180, 49050, 49051, 49052);
+INSERT INTO `creature_onkill_reward` (`creature_id`, `CurrencyId1`, `CurrencyCount1`) VALUES
+(42180, 396, 3500),
+(49050, 396, 3500),
+(49051, 396, 3500),
+(49052, 396, 3500);

src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingDescent/boss_omnotron_defense_system.cpp

@@ -1099,10 +1099,7 @@ class DistanceCheck
 
         bool operator()(WorldObject* object)
         {
-            if (Unit* unit = object->ToUnit())
-                return !unit->IsWithinMeleeRange(_caster);
-
-            return true;
+            return (object->GetExactDist2d(_caster) < 10.0f);
         }
     private:
         Unit* _caster;