more python 3.2 fixes

diff --git a/zonemaker/zone.py b/zonemaker/zone.py
index 094c0f868eee8fe19c6dc1fa4f583dfc6b3326e6..330c1842d3978440f1bf54127dc482d7062de472 100644 (file)
--- a/zonemaker/zone.py
+++ b/zonemaker/zone.py
@@ -258,7 +258,7 @@ class Zone:
         try:
             with open(self._serialfile) as f:
                 cur_serial = int(f.read())
-        except FileNotFoundError:
+        except OSError: # FileNotFoundError has been added in Python 3.3
             pass
         # increment serial
         cur_serial += 1