remsim: fix TPDU response size transmission

the TDPU response data size can be up to 256.
this length cannot be stored in a uint8_t, which would cause the
length to become 0, no data being send, and the reader reset the
card because of misbehaviour of the card (i.e. no/malformed
response leading to the timeout of the waiting time).

Change-Id: Id38f9e597ffff242e89ea3dd9fbdf0c9f444cc03
diff --git a/src/simtrace2-remsim_client.c b/src/simtrace2-remsim_client.c
index 9fbba85..31c5255 100644
--- a/src/simtrace2-remsim_client.c
+++ b/src/simtrace2-remsim_client.c
@@ -202,7 +202,7 @@
 
 /*! \brief Request the SIMtrace2 to transmit a Procedure Byte, then Tx */
 static int cardem_request_pb_and_tx(struct cardem_inst *ci, uint8_t pb,
-				    const uint8_t *data, uint8_t data_len_in)
+				    const uint8_t *data, uint16_t data_len_in)
 {
 	struct msgb *msg = st_msgb_alloc();
 	struct cardemu_usb_msg_tx_data *txd;