Fixed returns regression

Author: WillAyd

scripts/validate_docstrings.py

@@ -734,7 +734,7 @@ def get_validation_data(doc):
             if doc.method_returns_something:
                 errs.append(error('RT01'))
         else:
-            if len(doc.returns) == 1 and doc.returns[0][1]:
+            if len(doc.returns) == 1 and doc.returns[0].name:
                 errs.append(error('RT02'))
             for name_or_type, type_, desc in doc.returns:
                 if not desc: