dnssd: Fix off by one error when adding device names

for some reason, there was an off by one error, which means we always
dropped the last device, and never saw it when we were looking at scan
contexts...

pi@raspberrypi:~/libiio/build $ iio_info -s
Available contexts:
        0: 169.254.231.18 (cpu_thermal) [ip:raspberrypi.local]

should have been (and is after the fix):

pi@raspberrypi:~/libiio/build $ ./tests/iio_info -s
Available contexts:
        0: 169.254.231.18 (cpu_thermal,rpi_volt) [ip:raspberrypi.local]

Signed-off-by: Robin Getz <[email protected]>

dns_sd.c

@@ -123,7 +123,7 @@ static int dnssd_fill_context_info(struct iio_context_info *info,
 	} else {
 		iio_snprintf(description, sizeof(description), "%s (", addr_str);
 		p = description + strlen(description);
-		for (i = 0; i < iio_context_get_devices_count(ctx) - 1; i++) {
+		for (i = 0; i < iio_context_get_devices_count(ctx); i++) {
 			const struct iio_device *dev = iio_context_get_device(ctx, i);
 			const char *name = iio_device_get_name(dev);
 			if (name) {