knotc now exits when it fails to parse config file.

src/knot/ctl/knotc_main.c

@@ -430,7 +430,6 @@ int main(int argc, char **argv)
 	// Initialize log (no output)
 	log_init();
 	log_levels_set(LOGT_SYSLOG, LOG_ANY, 0);
-	log_levels_set(LOGT_STDERR, LOG_ANY, 0);
 	log_levels_set(LOGT_STDOUT, LOG_ANY, 0);
 
 	// Find implicit configuration file
@@ -444,6 +443,8 @@ int main(int argc, char **argv)
 	if (conf_open(config_fn) != 0) {
 		fprintf(stderr, "Failed to parse configuration '%s'.\n",
 		        config_fn);
+		free(default_fn);
+		return 1;
 	}
 
 	// Free default config filename if exists