Drangonflying Load Option

Use the power bar's visibility instead of CanGlide, because that appears
to be bugged.

Can't test it though.

Fixes: WeakAuras#4721

.luacheckrc

@@ -3672,6 +3672,7 @@ globals = {
 	"UnitPosition",
 	"UnitPower",
 	"UnitPowerBarTimerInfo",
+	"UnitPowerBarID",
 	"UnitPowerDisplayMod",
 	"UnitPowerMax",
 	"UnitPartialPower",

WeakAuras/Dragonriding.lua

@@ -10,11 +10,12 @@ local function HandleEvent(self, event, arg1)
 end
 
 local frame = CreateFrame("Frame")
-frame:RegisterEvent("PLAYER_CAN_GLIDE_CHANGED")
+frame:RegisterEvent("UNIT_POWER_BAR_SHOW")
+frame:RegisterEvent("UNIT_POWER_BAR_HIDE")
 frame:RegisterEvent("PLAYER_ENTERING_WORLD")
 frame:SetScript("OnEvent", HandleEvent)
 
 Private.IsDragonriding = function ()
-  return select(2, C_PlayerInfo.GetGlidingInfo())
+  return UnitPowerBarID("player") == 631
 end