try to fix build on py32 again

borg/helpers.py

@@ -13,7 +13,7 @@ try:
 except ImportError:
     def get_terminal_size(fallback=(80, 24)):
         TerminalSize = namedtuple('TerminalSize', ['columns', 'lines'])
-        return TerminalSize(os.environ.get('COLUMNS', int(fallback[0])), os.environ.get('LINES', int(fallback[1])))
+        return TerminalSize(int(os.environ.get('COLUMNS', int(fallback[0]))), int(os.environ.get('LINES', int(fallback[1]))))
 import sys
 import time
 import unicodedata