Handle Fixed Point Integers Going Into Case Structures

[nanocyte]

Currently, when you put a fixed point number into a case structure, it uses the next largest integer and you get a red cooercion dot:

 This is unfortunate because, you have to have a default case. It would be nice if the case structures could take the fixed point type since there's isn't any of the ambiguity that exits with floating point. Using a smaller number for the selector might also provide an optimization.