hda-analyzer: fix argument parsing

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/hda-analyzer/hda_analyzer.py b/hda-analyzer/hda_analyzer.py
index 993d552498565f2d2af0aa52852d1522fd8a73d5..77854a8892bb97a8e070ad14f260319a432da8a6 100755 (executable)
--- a/hda-analyzer/hda_analyzer.py
+++ b/hda-analyzer/hda_analyzer.py
@@ -965,7 +965,7 @@ mailing list, too.
     w.add_with_viewport(mframe)
 
 def main():
-  if sys.argv[1] in ('-h', '-help', '--help'):
+  if len(sys.argv) > 1 and sys.argv[1] in ('-h', '-help', '--help'):
     print __doc__ % globals()
     sys.exit(0)
   if read_nodes(sys.argv[1:]) == 0: