cli/diff: Fix undefined variable error with sdiff.

Fixes #386.

1 files changed, 3 insertions, 3 deletions

diff --git a/scripts/tracediff.py b/scripts/tracediff.py
index 4480c05a..f111322a 100755
--- a/scripts/tracediff.py
+++ b/scripts/tracediff.py
@@ -128,12 +128,12 @@ class ExternalDiffer(Differ):
                     '--new-line-format=+ %l\n',
                 ]
         elif tool == 'sdiff':
-            if width is None:
+            if options.width is None:
                 import curses
                 curses.setupterm()
-                width = curses.tigetnum('cols')
+                options.width = curses.tigetnum('cols')
             self.diff_args += [
-                '--width=%u' % width,
+                '--width=%u' % options.width,
                 '--speed-large-files',
             ]
         elif tool == 'wdiff':