Fixes errors with ternary operator paranthesis and chars.

[untaugh]

This would fix cases:

if ((1?2:3) < 2)

if L'\0' - 1 > 0

[ned14]

Thanks for the contribution of char literal support in expression, works nicely. I wasn't able to merge the ternary fix, it breaks the test suite, and given the terrible non-parsing implementation we rely heavily on being able to wrap the first argument in brackets to cause "the right thing" to happen.