fix(interval): Check if interval was cleared before invoking callback (#745)

init.lua

@@ -139,8 +139,10 @@ function SetInterval(callback, interval, ...)
         repeat
             interval = intervals[id]
             Wait(interval)
+
+            if interval < 0 then break end
             callback(table.unpack(args))
-        until interval < 0
+        until false
         intervals[id] = nil
     end)