Bad Code gen for structs containing Strings

[hopscc]

struct St
	var name as String
	var n as int
	
	cue init(name as String, n as int)
		.name = name
		.n = n
class T
	def main is shared
		x = St('xxx', 10)

gives

c:\home\hops\src\cobra\Tst\struct.cobra(2): error: "St.Name": cannot have instance field initializers in structs (C#)
Compilation failed - 1 error, 0 warnings

(Error from C# compiler)
offending lines in gen C# source

#line 1
public struct St{
#line 1
	
#line 1
	int _ih_invariantGuard;
#line 1
	
#line 2
	public System.String Name = null;
#line 3
	public System.Int32 N;
#line 3
} // struct St

Same for any ref class not just Strings.

Looks like for code gen in structs explicit (Null) initialisation of refclass members should be elided

[hopscc]

Codepatch, new test and relnote for suppressing default init on vars in structs.

[Chuck]

Patch applied in changeset:2420
Thanks.