Fix warning about ignoring return value of asprintf

[alistairking]

(Ideally also replacing use of asprintf with snprintf)

tsk-proxy.c: In function ‘inc_stat’:
tsk-proxy.c:208:3: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result]
   asprintf(&stats_key, "%s.%s", stats_key_prefix, stats_key_suffix);
   ^
tsk-proxy.c: In function ‘init_kafka’:
tsk-proxy.c:380:3: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result]
   asprintf(&topic_name, "%s.%s", cfg->kafka_topic_prefix, cfg->kafka_channel);
   ^
tsk-proxy.c:381:3: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result]
   asprintf(&group_id, "%s.%s", cfg->kafka_consumer_group, topic_name);
   ^
tsk-proxy.c: In function ‘create_stats_prefix’:
tsk-proxy.c:580:3: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result]
   asprintf(&stats_key_prefix, "%s.%s.%s.%s", STATS_METRIC_PREFIX,
   ^

[NullHypothesis]

It's easy to make sure that the return code isn't -1 but why use snprintf instead? For portability reasons?

[alistairking]

Yeah