Dead code in winedbg

[Francois Gouget]

Hi,

I have noticed that expr_alloc_uconstant() is unused in winedbg.
Is that normal?

It causes all of the code in the attached patch to essentially be dead 
code since expr.type is never set to EXPR_TYPE_U_CONST. Should we just 
remove all that code? Just the expr_alloc_uconstant() function? Or 
is this unused just because of a bug? Or maybe it will be used 'soon'?