vterm: Use errno.EWOULDBLOCK instead of 11.freebsd_fix

This will fix issues with unit tests on FreeBSD and hopefully on Mac OS
X, too.

1 files changed, 2 insertions, 1 deletions

diff --git a/urwid/vterm.py b/urwid/vterm.py
index 7ccc336..8d82fc8 100644
--- a/urwid/vterm.py
+++ b/urwid/vterm.py
@@ -26,6 +26,7 @@ import pty
 import time
 import copy
 import fcntl
+import errno
 import select
 import struct
 import signal
@@ -1525,7 +1526,7 @@ class Terminal(BoxWidget):
         except OSError, e:
             if e.errno == 5: # End Of File
                 data = ''
-            elif e.errno == 11: # empty buffer
+            elif e.errno == errno.EWOULDBLOCK: # empty buffer
                 return
             else:
                 raise