Iterating class implementing ArrayAccess with {foreach}

[chmeldax]

Hello,

it seems to me that the change introduced in 21aa211 prevents some certain classes implementing ArrayAccess from being iterated with foreach macro.

The condition in 21aa211#diff-6b401ee81e7ad91e8e4fb5f199bc6a3eR129 does not take into account classes that implement ArrayAccess but do not use numerical offsets.

Consequently, theinit() method then returns NULL and the iteration is not performed at all.

[uwetews]

Please note that a class implements ArrayAccess does not necessary mean that it can be iterated by foreach.