When the group composition changes, force a re-scan of all auras on units.

diff --git a/OvaleAura.lua b/OvaleAura.lua
index a01608f..f3988f2 100644
--- a/OvaleAura.lua
+++ b/OvaleAura.lua
@@ -216,7 +216,7 @@ function OvaleAura:OnEnable()
 	self:RegisterEvent("PLAYER_REGEN_ENABLED")
 	self:RegisterEvent("PLAYER_UNGHOST", "PLAYER_ALIVE")
 	self:RegisterEvent("UNIT_AURA")
-	self:RegisterMessage("Ovale_GroupChanged", "RemoveAurasOnInactiveUnits")
+	self:RegisterMessage("Ovale_GroupChanged", "ScanAllUnitAuras")
 	OvaleState:RegisterState(self, self.statePrototype)
 end