Fix optional Wykkyd Framework integration

diff --git a/Binder.lua b/Binder.lua
index 464db99..4a8040a 100644
--- a/Binder.lua
+++ b/Binder.lua
@@ -179,9 +179,9 @@ end

 EVENT_MANAGER:RegisterForEvent("Binder", EVENT_ADD_ON_LOADED, Binder.OnAddOnLoaded)

-if FW_SlashCommand ~= nil then
+if WF_SlashCommand ~= nil then
     -- Register via Wykkyd's framework for those who use it, to allow macroing
-    FW_SlashCommand("binder", Binder.SlashCommand)
+    WF_SlashCommand("binder", Binder.SlashCommand)
 else
     -- But don't require the framework.
     SLASH_COMMANDS["/binder"] = Binder.SlashCommand