Missing Code Generation on Control Structure Initializers

[ajbeach]

Cforall adds initializers to some control structures that C did not have (if and while). These are ignored always during code generation. While this is fair while generating C code, as everything has been moved out of them, but if we do a dump "ascodegen" then we can still have code in there and it does not appear there.

This lead me astray for a while when I was doing some debugging. If it happens there probably be one of those assertions that makes sure we are not generating C code.