Merge pull request #62 from passren/0.7.2

Bug fix

Author: passren

pydynamodb/sql/ddl_alter.py

@@ -365,7 +365,7 @@ def _construct_replica_gsi(
                     options = self._parse_option_path(option_path_name, option_value)
                     converted_ = {"IndexName": index_name}
 
-                    if options is not None or len(options) > 0:
+                    if options is not None and len(options) > 0:
                         converted_.update(options)
                     gsis_.append(converted_)