Update stream.c

I think call uv_read_stop is also the right way, even the better way, to make the assert happy.
When stream->read_cb(status=-1), I might wont call uv_close, because there are some uv_write are not returned or some other operations are pending.

ps:No description was found about force call uv_close after stream->read_cb(status=-1) in uv.h