Fix instant casts for non-player spells

I was out questing and kept seeing "Near Training Gem" pop as an instant-cast. This filter seems to have stopped it.

IceCastBar.lua

@@ -707,6 +707,11 @@ function IceCastBar.prototype:SpellCastSucceeded(event, unit, castGuid, spellId)
 		end
 	end
 
+	-- handle special spells that are used for quests or other things that don't apply to the player
+	if self.unit == "player" and not IsPlayerSpell(spellId) then
+		return
+	end
+
 	self:StartBar(IceCastBar.Actions.Success, spell.. self:GetShortRank(rank), spellId)
 end
 

changelog.md

@@ -3,6 +3,7 @@
 v1.14.6:
 
 - Add ability for buff/debuff watchers to only display when the specified buff/debuff is missing. This also adds the ability to require that the given unit exists. So if you had Unit set to Target, Display mode set to Missing, and Only if unit exists checked, you'd show the bar if you have a target and they don't have the given buff/debuff.
+- Don't flash the castbar for instant-cast spells that the player didn't cast (such as internal quest spells).
 
 v1.14.5:
 

this_version.md

@@ -3,6 +3,7 @@
 v1.14.6:
 
 - Add ability for buff/debuff watchers to only display when the specified buff/debuff is missing. This also adds the ability to require that the given unit exists. So if you had Unit set to Target, Display mode set to Missing, and Only if unit exists checked, you'd show the bar if you have a target and they don't have the given buff/debuff.
+- Don't flash the castbar for instant-cast spells that the player didn't cast (such as internal quest spells).
 
 v1.14.5: