cast to void produces wrong code

[TotallyGamerJet]

the following c code:

int a = 0;
(void)a;

should produce:

var a int = 0
_ = a

instead, it produces:

var a int = 0
a 

which doesn't compile in go because the variable is evaluated but not used

[dennwc]

There's a test case, but I don't remember why I decided to force the compilation error. I use cxgo for a pretty specific codebase, so I might have done it due to some issue there.

In any case, I agree that it should produce _ = a by default.