Constructor must call super-constructor

[floitschG]

class A { A() : a = 499;
          var a; }

class B extends A { B() { Expect.equals(499, a); }}

main() { new B(); }

I will submit this example as test-case.

[DartBot]

This comment was originally written by drfibonacci@google.com

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Set owner to @floitschG.
Added Area-Language, Accepted labels.

[floitschG]

Removed the owner.
Removed Area-Language label.
Added Area-VM, New labels.

[iposva-google]

Set owner to @mhausner.
Added Accepted label.

[DartBot]

This comment was originally written by @mhausner

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Fixed with CL 412.

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Added Fixed label.