fix direct passing of std::string to fprintf
fix direct passing of std::string to fprintf

starksm64/NativeRaspberryPiBeaconParser,starksm64/NativeRaspberryPiBeaconParser,starksm64/NativeRaspberryPiBeaconParser,starksm64/NativeRaspberryPiBeaconParser,starksm64/NativeRaspberryPiBeaconParser