Merge pull request #103 from nick13jaremek/fix/atexit-cleanup-condition

Added conditional check on 'atexit' event function: the Python interp…

Author: pwaller

scraperwiki/sql.py

@@ -123,7 +123,7 @@ def commit_transactions():
     """
     Ensure any outstanding transactions are committed on exit
     """
-    if _State._transaction is not None:
+    if _State is not None and _State._transaction is not None:
         _State._transaction.commit()
         _State._transaction = None