Fix player castbar flashes

There are controls on the player castbar module for flashing when a spell succeeds or fails, and separate controls for flashing when an instant cast completes. Those were broken (flashing never happened), but now work again.

UpdateBar() was necessary in MyOnUpdate() in the event that no other spell has been cast (in order to set the alpha so that the bottom text displays). The spellId is being passed along so that spells that aren't currently being cast can have their name and icon displayed appropriately, and so the early-out for "no known spell" doesn't trigger (which allows the Flash to actually work). The self.current reset fixes instant casts after a normal cast (we were only clearing the "current" spell conditionally when we only meant to filter StopBar, so if it wasn't cleared, future successful casts thought they were for a different spell than was currently being cast.

IceCastBar.lua

@@ -393,6 +393,8 @@ function IceCastBar.prototype:MyOnUpdate()
 			return
 		end
 
+		self:UpdateBar(1, self:GetCurrentCastingColor())
+
 		if (self.action == IceCastBar.Actions.Failure) then
 			self:FlashBar("CastFail", 1-scale, self.actionMessage, "CastFail")
 		else
@@ -478,7 +480,7 @@ function IceCastBar.prototype:FlashBar(color, alpha, text, textColor)
 end
 
 
-function IceCastBar.prototype:StartBar(action, message)
+function IceCastBar.prototype:StartBar(action, message, spellId)
 	local spell, rank, displayName, icon, startTime, endTime, isTradeSkill, numStages
 	if IceHUD.SpellFunctionsReturnRank then
 		spell, rank, displayName, icon, startTime, endTime, isTradeSkill = UnitCastingInfo(self.unit)
@@ -493,6 +495,10 @@ function IceCastBar.prototype:StartBar(action, message)
 		end
 	end
 
+	if spellId and not spell then
+		spell, rank, icon = GetSpellInfo(spellId)
+	end
+
 	local isChargeSpell = numStages and numStages > 0
 	if isChargeSpell then
 		self.NumStages = numStages
@@ -514,7 +520,7 @@ function IceCastBar.prototype:StartBar(action, message)
 	if LibClassicCasterino and not spell then
 		self:StopBar()
 	elseif not spell then
-	  return
+		return
 	end
 
 	if icon ~= nil then
@@ -590,7 +596,7 @@ function IceCastBar.prototype:SpellCastStart(event, unit, castGuid, spellId)
 	IceHUD:Debug("SpellCastStart", unit, castGuid, spellId)
 	--UnitCastingInfo(unit)
 
-	self:StartBar(IceCastBar.Actions.Cast)
+	self:StartBar(IceCastBar.Actions.Cast, nil, spellId)
 	self.current = castGuid
 end
 
@@ -609,8 +615,9 @@ function IceCastBar.prototype:SpellCastStop(event, unit, castGuid, spellId)
 		self.action ~= IceCastBar.Actions.ReverseChannel)
 	then
 		self:StopBar()
-		self.current = nil
 	end
+
+	self.current = nil
 end
 
 
@@ -639,7 +646,7 @@ function IceCastBar.prototype:SpellCastFailed(event, unit, castGuid, spellId)
 		end
 	end
 
-	self:StartBar(IceCastBar.Actions.Failure, "Failed")
+	self:StartBar(IceCastBar.Actions.Failure, "Failed", nil, spellId)
 end
 
 function IceCastBar.prototype:SpellCastInterrupted(event, unit, castGuid, spellId)
@@ -653,7 +660,7 @@ function IceCastBar.prototype:SpellCastInterrupted(event, unit, castGuid, spellI
 
 	self.current = nil
 
-	self:StartBar(IceCastBar.Actions.Failure, "Interrupted")
+	self:StartBar(IceCastBar.Actions.Failure, "Interrupted", spellId)
 end
 
 function IceCastBar.prototype:SpellCastDelayed(event, unit, castGuid, spellId)
@@ -687,7 +694,7 @@ function IceCastBar.prototype:SpellCastSucceeded(event, unit, castGuid, spellId)
 
 	-- show after normal successfull cast
 	if (self.action == IceCastBar.Actions.Cast) then
-		self:StartBar(IceCastBar.Actions.Success, spell.. self:GetShortRank(rank))
+		self:StartBar(IceCastBar.Actions.Success, spell.. self:GetShortRank(rank), spellId)
 		return
 	end
 
@@ -700,7 +707,7 @@ function IceCastBar.prototype:SpellCastSucceeded(event, unit, castGuid, spellId)
 		end
 	end
 
-	self:StartBar(IceCastBar.Actions.Success, spell.. self:GetShortRank(rank))
+	self:StartBar(IceCastBar.Actions.Success, spell.. self:GetShortRank(rank), spellId)
 end