contrib/fast-import/import-zips.py: fix broken error message

The 'sys' module is not imported but all of the bits
we want from it are.  Adjust the script to not fail
when run on old Python versions and fix the inconsistent
use of tabs.

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/contrib/fast-import/import-zips.py b/contrib/fast-import/import-zips.py
index 8f2923d359aedda30d1250df673dffad8e05ad1c..1936a730b2418a7b444c54ff63887cb5139326fb 100755 (executable)
--- a/contrib/fast-import/import-zips.py
+++ b/contrib/fast-import/import-zips.py
@@ -15,8 +15,8 @@
 
 if hexversion < 0x01060000:
         # The limiter is the zipfile module
-        sys.stderr.write("import-zips.py: requires Python 1.6.0 or later.\n")
-        sys.exit(1)
+        stderr.write("import-zips.py: requires Python 1.6.0 or later.\n")
+        exit(1)
 
 if len(argv) < 2:
         print 'usage:', argv[0], '<zipfile>...'