bug fix with masterNodes

diff --git a/OvaleFrame.lua b/OvaleFrame.lua
index 59f88e2..0a11845 100644
--- a/OvaleFrame.lua
+++ b/OvaleFrame.lua
@@ -145,6 +145,10 @@ do

 		local now = GetTime()

+		if not Ovale.masterNodes then
+			return
+		end
+
 		if not Ovale.refreshNeeded and self.lastUpdate and now < self.lastUpdate + Ovale.db.profile.apparence.updateInterval then
 			return
 		end