authentication failures are not returned to the callback correctly

[jack]

If you change line 32 of source:/trunk/libstrophe/examples/basic.c to

fprintf(stderr, "DEBUG: disconnected, error: %d, stream_error: %p\n", error, stream_error);

and log in with the wrong password, libstrophe reports:

DEBUG: disconnected, error: 0, stream_error: 0x0

There doesn't seem to be a way to detect authentication failure like in strophe.js. Also, the error is never used internally.