#51 WindowsDeviceNotifier.OnDeviceChange throws OverflowException on 64 Bit machines.

[JasonG]

I ran into crashes on the call to WindowsDeviceNotifier.OnDeviceChange on when using 64 bit machines. The issue is that IntPtr.LParam.ToInt32() returns a 64 bit number and throws an OverflowException as described in https://msdn.microsoft.com/query/dev14.query?appId=Dev14IDEF1&l=EN-US&k=k%28System.IntPtr.ToInt32%29;k%28TargetFrameworkMoniker-.NETFramework

Line 115 should be changed from:
if (m.LParam.ToInt32() != 0)
to
if (m.LParam != IntPtr.Zero)

This fixes it right up as far as my limited testing can tell. I built with VS 2015 using .NET 4.6.1.