Add explanatory comment to repository check

Amends change b97da3efa0462a4de6ae20904dde3843bc18bce2.

Change-Id: I8a48aa0d313f370f3933ff699ec2ed347f760e8b
Reviewed-by: Christian Tismer <tismer@stackless.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 65805d0f4..b4f24dc70 100644
--- a/setup.py
+++ b/setup.py
@@ -350,6 +350,7 @@ def prepareSubModules():
         module_version = m[1]
         module_dir = m[2] if len(m) > 2 else ''
         module_dir = os.path.join(submodules_dir, module_dir, module_name)
+        # Check for non-empty directory (repository checked out)
         if not os.listdir(module_dir):
             needInitSubModules = True
         modulesList.append([module_name, module_version, module_dir])