revert the ITS#3139 change for now

libraries/libldap/cyrus.c

@@ -384,8 +384,6 @@ sb_sasl_write( Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
 
 	ret = ber_pvt_sb_do_write( sbiod, &p->buf_out );
 	if ( ret <= 0 ) {
-		/* caller will retry, so clear this buffer out */
-		p->buf_out.buf_ptr = p->buf_out.buf_end;
 		return ret;
 	}
 	return len;