Really, most don't need it, and whinging about not having it defined
isn't useful.
Signed-off-by: Keith Packard <keithp@keithp.com>
#ifndef USE_SERIAL_9_STDIN
#define USE_SERIAL_9_STDIN 0
#endif
#ifndef USE_SERIAL_9_STDIN
#define USE_SERIAL_9_STDIN 0
#endif
+#ifndef PACKET_HAS_SLAVE
+#define PACKET_HAS_SLAVE 0
+#endif
#define USE_SERIAL_STDIN (USE_SERIAL_0_STDIN + \
USE_SERIAL_1_STDIN + \
#define USE_SERIAL_STDIN (USE_SERIAL_0_STDIN + \
USE_SERIAL_1_STDIN + \