Add Stagger overflow exception and fix Swift Reflexes self hit

Author: 1337LutZ

sim/monk/brewmaster/TestBrewmaster.results

@@ -3086,10 +3086,10 @@ dps_results: {
 dps_results: {
  key: "TestBrewmaster-Average-Default"
  value: {
-  dps: 116510.47879
-  tps: 116510.47879
-  dtps: 46610.76715
-  hps: 12007.64212
+  dps: 120326.48676
+  tps: 120326.48676
+  dtps: 45251.02799
+  hps: 12038.29029
  }
 }
 dps_results: {
@@ -3479,9 +3479,9 @@ dps_results: {
 dps_results: {
  key: "TestBrewmaster-SwitchInFrontOfTarget-Default"
  value: {
-  dps: 118506.85627
-  tps: 118506.85627
-  dtps: 47636.38354
-  hps: 11687.65449
+  dps: 122342.63316
+  tps: 122342.63316
+  dtps: 45996.25251
+  hps: 11784.50849
  }
 }

sim/monk/brewmaster/stagger.go

@@ -61,6 +61,11 @@ func (bm *BrewmasterMonk) registerStagger() {
 			oldDamagePerTick := dot.SnapshotBaseDamage
 			dot.SnapshotBaseDamage = damagePerTick
 			bm.Stagger.Cast(sim, target)
+			newStaggerValue := int32(damagePerTick)
+			if newStaggerValue < 0 {
+				panic("Stagger is above 2.147 billion. Please check your Rotation/Encounter settings.")
+			}
+
 			dot.Aura.SetStacks(sim, int32(damagePerTick))
 
 			if sim.Log != nil && dot.Aura.IsActive() {

sim/monk/passives.go

@@ -89,7 +89,7 @@ func (monk *Monk) registerSwiftReflexes() {
 		OnSpellHitTaken: func(aura *core.Aura, sim *core.Simulation, spell *core.Spell, result *core.SpellResult) {
 			if icd.IsReady(sim) && result.Outcome.Matches(core.OutcomeParry) {
 				icd.Use(sim)
-				swiftReflexesAttack.Cast(sim, result.Target)
+				swiftReflexesAttack.Cast(sim, spell.Unit)
 			}
 		},
 	}).AttachAdditivePseudoStatBuff(&monk.PseudoStats.BaseParryChance, 0.05))