fix wrath client detection

Author: Road-block

Config.lua

@@ -396,6 +396,12 @@ end
             bc = { name = L["Burning Crusade"], type = "group", args = {}, order = 60 },
             vanilla = { name = L["Classic"], type = "group", args = {}, order = 70 },
         }
+    elseif mod:IsWrathClassic() then
+        expansions = {
+            wotlk = { name = L["Wrath of the Lich King"], type = "group", args = {}, order = 50 },
+            bc = { name = L["Burning Crusade"], type = "group", args = {}, order = 60 },
+            vanilla = { name = L["Vanilla"], type = "group", args = {}, order = 70 },            
+        }
     else
         expansions = {
             bfa = { name = L["Battle for Azeroth"], type = "group", args = {}, order = 10 },

MagicMarker.lua

@@ -221,6 +221,10 @@ function mod:IsBurningCrusadeClassic()
     return (WOW_PROJECT_ID == WOW_PROJECT_BURNING_CRUSADE_CLASSIC)
 end
 
+function mod:IsWrathClassic()
+    return (WOW_PROJECT_ID == WOW_PROJECT_WRATH_CLASSIC)
+end
+
 function mod:OnInitialize()
     -- Set up the config database
     self.db = LibStub("AceDB-3.0"):New("MagicMarkerConfigDB", defaultConfigDB, "Default")