Merging pull request 156

Signed-off-by: Lukáš Doktor <[email protected]>

* github.com:autotest/aexpect:
  client: Avoid double-cleanup exception

Author: ldoktor

aexpect/client.py

@@ -473,7 +473,7 @@ def close(self, sig=signal.SIGKILL):
                 try:
                     unlock_fd(lock)
                     os.unlink(self._close_lockfile)
-                except FileNotFoundError:
+                except (FileNotFoundError, OSError):
                     # File already removed by other thread
                     pass