Editorial: Widen parameter type of CreateDynamicFunction

[tmdghks]

According to the current specification, type of the newTarget in CreateDynamicFunction needs to be a constructor. However, there is the case that newTarget is undefined as follows:

Function();

When this code executes, Function calls CreateDynamicFunction in third step as follows:

<emu-alg>
1. Let _C_ be the active function object.
1. If _bodyArg_ is not present, set _bodyArg_ to the empty String.
1. Return ? CreateDynamicFunction(_C_, NewTarget, ~normal~, _parameterArgs_, _bodyArg_).
</emu-alg>

In this situation, undefined is assigned to NewTarget . Therefore, type-mismatch occurs in the parameter newTarget of CreateDynamicFunction. Therefore, I think that the parameter type of the newTarget should be widened into a constructor or undefined.

[jmdyck]

Looks correct to me.

[tmdghks]

Thank you very much for your review!