More cleanups.

- removed dodgy fprintf() error handling

 - return an error string from open_pipe_creds() so the appropriate
   exception can be raised by the caller

 - reformatting

source/python/py_common_proto.h

@@ -12,8 +12,8 @@ void py_samba_init(void);
 PyObject *get_debuglevel(PyObject *self, PyObject *args);
 PyObject *set_debuglevel(PyObject *self, PyObject *args);
 PyObject *py_setup_logging(PyObject *self, PyObject *args, PyObject *kw);
-struct cli_state *open_pipe_creds(char *system_name, PyObject *creds, 
-				  cli_pipe_fn *connect_fn);
+struct cli_state *open_pipe_creds(char *server, PyObject *creds, 
+				  cli_pipe_fn *connect_fn, char **errstr);
 
 /* The following definitions come from python/py_ntsec.c  */