Change back to CSP_O_NONE in csp_transaction

Future versions should add an option argument to csp_transaction,
or maybe have a csp_transaction_set_options() to change it globally

src/csp_io.c

@@ -377,7 +377,7 @@ int csp_transaction_persistent(csp_conn_t * conn, uint32_t timeout, void * outbu
 
 int csp_transaction(uint8_t prio, uint8_t dest, uint8_t port, uint32_t timeout, void * outbuf, int outlen, void * inbuf, int inlen) {
 
-	csp_conn_t * conn = csp_connect(prio, dest, port, 0, CSP_O_CRC32);
+	csp_conn_t * conn = csp_connect(prio, dest, port, 0, CSP_O_NONE);
 	if (conn == NULL)
 		return 0;