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

src/cpu.cpp

@@ -9,19 +9,20 @@
 
 namespace cpu {
 
-void detectHwmon(cpuSensors* target, const std::string& pci) {
+int detect(cpuSensors* target, const std::string& pci) {
     const std::string path = "/sys/bus/pci/devices/" + pci + "/hwmon";
 
     try {
         target->hwmon = utils::getFirstDir(path);
     } catch (...) {
         applog(LOG::ERR, "NO CPU HWMON KERNEL MODULE DETECTED");
-        return;
+        return -1;
     }
 
     target->module = utils::fileExists(target->hwmon + "/in1_input") ? zenpower : k10temp; // idk if this is reliable, we're trying to avoid just reading the name
     target->num_cores = std::thread::hardware_concurrency();
     applog(LOG::INF, "Detected {} cores, module enum #{} in path \"{}\"", target->num_cores, static_cast<uint8_t>(target->module), target->hwmon);
+    return 0;
 }
 
 void update(cpuSensors* c) {