program crashes on exit or when selecting hardware to display

What is the expected output? What do you see instead?
- The expected output would be not to crash.  This also happens when you goto 
File->Hardware and select or deselect anything.

What version of the product are you using? On what operating system?
- files from the svn trunk Version: 0.6.0.8 / OS is Windows 7 Ultimate x64

Please provide any additional information below.
- The problem is when the logger.cs file calls the SensorRemoved() function.  
This function tries to access sensors.Length but cannot be because sensors is 
null.

Please attach a Report created with "File / Save Report...".
- You can reproduce the problem by running the program and without doing 
anything else select File->Hardware and select or deselect anything.

Original issue reported on code.google.com by elitteer1@gmail.com on 14 Aug 2013 at 3:06

Merged into: #7

hglei / open-hardware-monitor

program crashes on exit or when selecting hardware to display #496