[Breakpoints] NullReferenceException in an unknown location

[ashmind]

Related to #4.

Unexpected exception: System.NullReferenceException: Object reference not set to an instance of an object.
   at ExceptionBreaker.Breakpoints.BreakpointFinder.GetBreakpointForCommand()
   at ExceptionBreaker.Breakpoints.BreakpointExceptionsController.command_BeforeQueryStatus(Object sender, EventArgs e)