Allow initialization of enums in global context#64
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Previously, in C, enums were initialized with the
Enum::from(X as i32)pattern because enum variants are represented as int and the type of variable is represented as enum.The From trait is not allowed in global context because it's non-const. This PR fixes this by short-circuiting
ConvertIntegerToEnumeralCastto emitXinstead ofEnum::from(X as i32)