Fill in serial field for all HID controllers using hidapi

Controllers/AMDWraithPrismController/AMDWraithPrismController.cpp

@@ -49,6 +49,17 @@ char* AMDWraithPrismController::GetDeviceName()
     return device_name;
 }
 
+std::string AMDWraithPrismController::GetSerialString()
+{
+    wchar_t serial_string[128];
+    hid_get_serial_number_string(dev, serial_string, 128);
+
+    std::wstring return_wstring = serial_string;
+    std::string return_string(return_wstring.begin(), return_wstring.end());
+
+    return(return_string);
+}
+
 std::string AMDWraithPrismController::GetEffectChannelString(unsigned char channel)
 {
     std::string ret_string = "";

Controllers/AMDWraithPrismController/AMDWraithPrismController.h

@@ -117,6 +117,7 @@ public:
     std::string GetEffectChannelString(unsigned char channel);
     std::string GetFirmwareVersionString();
     std::string GetLocationString();
+    std::string GetSerialString();
 
     void SetRingEffectChannel(unsigned char channel);
 

Controllers/AMDWraithPrismController/RGBController_AMDWraithPrism.cpp

@@ -19,6 +19,7 @@ RGBController_AMDWraithPrism::RGBController_AMDWraithPrism(AMDWraithPrismControl
     description = "AMD Wraith Prism Device";
     version     = wraith->GetFirmwareVersionString();
     location    = wraith->GetLocationString();
+    serial      = wraith->GetSerialString();
 
     mode Direct;
     Direct.name       = "Direct";