wvtest_main: use immutable arg default value

Signed-off-by: Rob Browning <rlb@defaultvalue.org>
Tested-by: Rob Browning <rlb@defaultvalue.org>

diff --git a/wvtest.py b/wvtest.py
index fdb4822dc3d1b90d69fe7f2060d1d46d610fa5c5..9182268438e033e9687479409a0f54f322952171 100755 (executable)
--- a/wvtest.py
+++ b/wvtest.py
@@ -201,7 +201,7 @@ def _run_registered_tests():
         print
 
 
-def wvtest_main(extra_testfiles=[]):
+def wvtest_main(extra_testfiles=tuple()):
     import wvtest as _wvtestmod
     _run_registered_tests()
     for modname in extra_testfiles: