To ensure that qualifiers within an array-style
parameter declaration (e.g. int [const 2] are handled
correctly, post_type() is modified to collect qualifiers
and OR them into the t member of CType.
The new test for restrict also passes, but only
because the restrict keyword is ignored.
Previously, TCC wrongly discarded the const and
volatile qualifiers from parameter types when
adjusting them.
- convert_parameter_type() will no longer remove
the const and volatile qualifiers from a CType.
- a new function, convert_expression_type(), will
remove the const and volatile qualifiers before
tail-calling convert_parameter_type().
- unary() and gexpr() will call
convert_expression_type() instead of
convert_parameter_type() to ensure that
expression semantics are unchanged.
The new tests for restrict also pass, but only
because the restrict keyword is ignored.
