Hyper-V: Fix integer overflows in 32-bit builds

builder/hyperv/common/step_create_vm.go

@@ -61,9 +61,9 @@ func (s *StepCreateVM) Run(_ context.Context, state multistep.StateBag) multiste
 	}
 
 	// convert the MB to bytes
-	ramSize := int64(s.RamSize * 1024 * 1024)
-	diskSize := int64(s.DiskSize * 1024 * 1024)
-	diskBlockSize := int64(s.DiskBlockSize * 1024 * 1024)
+	ramSize := int64(s.RamSize) * 1024 * 1024
+	diskSize := int64(s.DiskSize) * 1024 * 1024
+	diskBlockSize := int64(s.DiskBlockSize) * 1024 * 1024
 
 	err := driver.CreateVirtualMachine(s.VMName, path, harddrivePath, ramSize, diskSize, diskBlockSize,
 		s.SwitchName, s.Generation, s.DifferencingDisk, s.FixedVHD, s.Version)