Fix wrong battery scale on linux

openVulkanoCpp/Host/Linux/SystemInfo.cpp

@@ -329,9 +329,9 @@ namespace OpenVulkano
 		{
 			float value;
 			powerSupplyFile >> value;
-			return value;
+			return value / 100.0f;
 		}
-		return 0;
+		return -1;
 	}
 
 	void SystemInfo::EnableEnergyEvents()

openVulkanoCpp/Host/SystemInfo.hpp

@@ -56,6 +56,7 @@ namespace OpenVulkano
 		static bool IsDeviceInLowPowerMode();
 		static bool GetDeviceHasBattery() { return GetDeviceBatteryState() != BatteryState::Unavailable; }
 		static BatteryState GetDeviceBatteryState();
+		// 0 to 1; -1 not available
 		static float GetDeviceBatteryLevel();
 		static void EnableEnergyEvents();