piglit: Print help instead of excepting if no arguments are given

This fixes a small bug that causes piglit to print an exception when
./piglit is called with no arguments. It will, with this patch, print
the help message and exit.

Signed-off-by: Dylan Baker <dylanx.c.baker@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/piglit b/piglit
index 05fff141e..4bc755547 100755
--- a/piglit
+++ b/piglit
@@ -121,6 +121,7 @@ def main():
         input_ = sys.argv[1:]
 
     parser = argparse.ArgumentParser()
+    parser.set_defaults(func=lambda *_, **__: parser.print_help())
     subparsers = parser.add_subparsers()
     print_cmd = subparsers.add_parser('print-cmd',
                                       add_help=False,