add some return values to some shit so it shuts down elegantly on crash

src/sys.cpp

@@ -65,14 +65,15 @@ void sys::getNetwork(Network* net, const std::string& device) {
     prev = current;
 }
 
-void sys::detectHwmon(sysSensors* s, const std::string& platform) {
+int sys::detect(sysSensors* s, const std::string& platform) {
     // we dont really need getFirstDir since its a static folder, but its useful for try/catch
     try {
         s->hwmon = utils::getFirstDir("/sys/devices/platform/" + platform + "/hwmon");
     } catch (...) {
         applog(LOG::ERR, "Can't open sys hwmon. Module loaded? Kernel params added?");
-        return;
+        return -1;
     }
+    return 0;
 }
 
 void sys::updateSensors(sysSensors* s) {