Fix option parsing on some platforms (e.g. ARM)

getopt_long returns an int, not a char, and on some platforms we hit
issues with the sign extension as a result. Do it properly.

Fixes #2

diff --git a/mqtt-arp.c b/mqtt-arp.c
index 2836366b40391dfa6d9373e8fb9e316268f91d28..bc65fbb2acf63088be69342005ba892bc72fc09e 100644 (file)
--- a/mqtt-arp.c
+++ b/mqtt-arp.c
@@ -361,7 +361,7 @@ int main(int argc, char *argv[])
        struct ma_config config;
        int option_index = 0;
        int macs = 0;
-       char c;
+       int c;
 
        bzero(&config, sizeof(config));
        config.mqtt_port = MQTT_PORT;