rdp: notify the Activate state as soon as it happens

Without the patch, we parse more packets and the calling code doesn't have the
opportunity to invoke PostConnect callback (make the connection not work in the proxy)

libfreerdp/core/rdp.c

@@ -1631,6 +1631,9 @@ static state_run_t rdp_handle_sc_flags(rdpRdp* rdp, wStream* s, UINT32 flag,
 		{
 			if (!rdp_client_transition_to_state(rdp, nextState))
 				status = STATE_RUN_FAILED;
+			else
+				status = (rdp_get_state(rdp) == CONNECTION_STATE_ACTIVE) ? STATE_RUN_ACTIVE
+				                                                         : STATE_RUN_SUCCESS;
 		}
 		else
 		{