not resetting the current context properly (parse_for); expect in expressions
suddenly return NULL which triggers asserts
- label: declaration; is no valid C99 but we parse it anyway
-- designator support for initializers
-- add constant folding code
+- add constant folding code (optional, ast2firm already does it)
- Refactor code, so code to handle number values (and strings?) is an own
module and replacable
- Support some attributes. noreturn, unused, printf, scanf, packed would be