Update ExtendedJsonRpcApi.py

- add fix provided by @localhuman so original methods are returned as well as extended methods

Author: jseagrave21

neo/api/JSONRPC/ExtendedJsonRpcApi.py

@@ -58,4 +58,4 @@ def json_rpc_method_handler(self, method, params):
             else:
                 raise JsonRpcError(-400, "Access denied.")
 
-        super(ExtendedJsonRpcApi, self).json_rpc_method_handler(method, params)  
+        return super(ExtendedJsonRpcApi, self).json_rpc_method_handler(method, params)