ReadyCheck annouce should now properly cancel if already responded.

diff --git a/ReadyCheckManager.lua b/ReadyCheckManager.lua
index 6b22c53..a5aa99a 100644
--- a/ReadyCheckManager.lua
+++ b/ReadyCheckManager.lua
@@ -94,7 +94,7 @@ function RCM:OnReadyCheckEnd()
 end

 function RCM:Announce(sender)
-	if not self:ReadyCheckPending() then return end
+	if not self:ReadyCheckPending() or self:HasResponded() then return end
 	CM:SendMessage(L("RCM_ANNOUNCE"):format(sender), "SMART")
 end