tests: make sure i is defined

The test script can die in case there are severe problems,
such as rlen being 0 -- in that case i is undefined and script
evaluation is aborted.

Found during nft development, no existing test case shows this
problem.

Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/tests/py/nft-test.py b/tests/py/nft-test.py
index 7f424cf1e92d0c8d6158f56272ca9da5ee0f9c4a..bc0849e0410b564f76687d5064a1cf513a91576c 100755 (executable)
--- a/tests/py/nft-test.py
+++ b/tests/py/nft-test.py
@@ -138,6 +138,7 @@ def color_differences(rule, other, color):
     rlen = len(rule)
     olen = len(other)
     out = ""
+    i = 0
 
     # find equal part at start
     for i in range(rlen):