# HG changeset patch
# User David Douard <david.douard@logilab.fr>
# Date 1468925248 -7200
# Node ID 5a366414d904d6a42eca4f6c8870d986b3fe8ddc
# Parent  5149a4d4cf5434f4d4018b378c6c0cb01e333441
[dataimport] fix count_lines function (closes #14407650)

ensure i allways exists whatever f content is

diff -r 5149a4d4cf54 -r 5a366414d904 dataimport.py
--- a/dataimport.py	Tue Jul 19 13:50:56 2016 +0200
+++ b/dataimport.py	Tue Jul 19 12:47:28 2016 +0200
@@ -95,6 +95,7 @@
     else:
         f = stream_or_filename
         f.seek(0)
+    i = 0  # useful is f is an empty file
     for i, line in enumerate(f):
         pass
     f.seek(0)