Add length_type to ArrayType and ArrayCreationExpression
So far this lays the groundwork to support a custom array length type. By avoiding the hard coding of "int" length types in codegen and results in some nice generalising. It will still default to int_type which matches the current behavior.
http://paldo.org:8010/builders/vala-staging/builds/664
See #607 (closed)
Edited by Rico Tzschichholz