Wind fix

Author: adithyaov

core/src/Streamly/Internal/FileSystem/Windows/ReadDir.hsc

@@ -31,6 +31,7 @@ import Foreign.C (CInt(..), CWchar(..), Errno(..), errnoToIOError, peekCWString)
 import Numeric (showHex)
 import Streamly.Internal.Data.Array (Array(..))
 import Streamly.Internal.Data.Unfold.Type (Unfold(..))
+import Streamly.Internal.Data.Stream (Step(..))
 import Streamly.Internal.FileSystem.Path (Path)
 import Streamly.Internal.FileSystem.WindowsPath (WindowsPath(..))
 import System.IO.Error (ioeSetErrorString)