Cleaned up RNG seeds based upon Unity docs for caching

Author: ashblue

Assets/FluidBehaviorTree/Scripts/Tasks/Conditions/RandomChance.cs

@@ -2,31 +2,23 @@
 
 namespace Adnc.FluidBT.Tasks {
     public class RandomChance : ConditionBase {
-        private Random.State _state;
-        
         public float chance = 1;
         public float outOf = 1;
         public int seed;
 
-        protected override void OnInit () {                
+        protected override bool OnUpdate () {
             var oldState = Random.state;
 
             if (seed != 0) {
                 Random.InitState(seed);
             }
-
-            _state = Random.state;
-            Random.state = oldState;
-        }
-
-        protected override bool OnUpdate () {
-            var oldState = Random.state;
-            Random.state = _state;
 
             var percentage = chance / outOf;
             var rng = Random.value;
-            
-            Random.state = oldState;
+
+            if (seed != 0) {
+                Random.state = oldState;
+            }
 
             return rng <= percentage;
         }