Fixes PercentUsedSpace,PercentFreeSpace to be same with df command. (#10)

source/code/providers/SCX_FileSystemStatisticalInformation_Class_Provider.cpp

@@ -105,10 +105,11 @@ static void EnumerateOneInstance(
             inst.UsedMegabytes_value(data1);
             unsigned char freeSpace = 100;
             unsigned char usedSpace = 0;
-            if (0 < data1+data2)
+            scxulong totalData = data1 + data2;
+            if (0 < totalData)
             {
-                freeSpace = (unsigned char) SCXCoreLib::GetPercentage(0, data2, 0, data3);
-                usedSpace = (unsigned char) SCXCoreLib::GetPercentage(0, data1, 0, data3);
+                freeSpace = (unsigned char) SCXCoreLib::GetPercentage(0, data2, 0, totalData);
+                usedSpace = (unsigned char) SCXCoreLib::GetPercentage(0, data1, 0, totalData);
             }
             inst.PercentFreeSpace_value(freeSpace);
             inst.PercentUsedSpace_value(usedSpace);