Change ClassParser corresponding to the removal of EIn expr

[DleanJeans]

The commit which removed EIf causes this error in MUnit:

HaxeToolkit\haxe\lib\mcover/2,1,1/mcover/macro/ClassParser.hx:353: characters 9-12 : Identifier 'EIn' is not part of haxe.macro.ExprDef (Suggestion: EIf)

A quick workaround is removing the case

case EIn(e1, e2):
	//e.g. for(i in 0...5){}
	e1 = parseExpr(e1);
	e2 = parseExpr(e2);
	expr.expr = EIn(e1, e2);

but I think there must be something else to it.