Free location_struct, set user agent and don't log if no location has been acquired

src/main.c

@@ -44,6 +44,7 @@ int upload_location_data(struct location_data *location) {
 	CURL *upload_request;
 	upload_request = curl_easy_init();
 	curl_easy_setopt(upload_request, CURLOPT_URL, location_url);
+	curl_easy_setopt(upload_request, CURLOPT_USERAGENT, "phonetrack-linux");
 
 	CURLcode response = curl_easy_perform(upload_request);
 
@@ -79,7 +80,13 @@ void get_location(GClueSimple *simple) {
 		location_struct->timestamp = timestamp_sec;
 	}
 
+	if (location_struct->latitude == 0.0F && location_struct->longitude == 0.0F) {
+		return;
+	}
+
 	upload_location_data(location_struct);
+
+	free(location_struct);
 }
 
 void on_geoclue_client_active(GClueClient *geoclue_client, GParamSpec *parameter_spec, gpointer user_data) {