Fix hangup on reading of closed socket

We cannot get more date on closed socket, return what we have, if anythink

Author: pinkavaj

adafruit_wiznet5k/adafruit_wiznet5k_socket.py

@@ -594,6 +594,12 @@ def recv_into(self, buffer: bytearray, nbytes: int = 0, flags: int = 0) -> int:
             elif num_read > 0:
                 # We got a message, but there are no more bytes to read, so we can stop.
                 break
+            elif self._status in (
+                wiznet5k.adafruit_wiznet5k.SNSR_SOCK_CLOSED,
+                wiznet5k.adafruit_wiznet5k.SNSR_SOCK_CLOSE_WAIT,
+            ):
+                # No bytes to read and we will not get more, stop.
+                break
             # No bytes yet, or more bytes requested.
             if self._timeout > 0 and time.monotonic() - last_read_time > self._timeout:
                 raise timeout("timed out")