Fix default argument in toolhelper.py
Allow the client to pass None instead of the empty array.
Change-Id: I89704c1891a7c69275c99b1469dbf88b460e830a
diff --git a/tools/toolhelper.py b/tools/toolhelper.py
index cc1a9cb..1eee1f7 100644
--- a/tools/toolhelper.py
+++ b/tools/toolhelper.py
@@ -14,9 +14,10 @@
def run(tool, args, build=None, debug=True,
profile=False, track_memory_file=None, extra_args=None,
stderr=None, stdout=None, return_stdout=False, timeout=0, quiet=False,
- cmd_prefix=[]):
+ cmd_prefix=None):
cmd = []
- cmd.extend(cmd_prefix)
+ if cmd_prefix:
+ cmd.extend(cmd_prefix)
if build is None:
build, args = extract_build_from_args(args)
if build:
