Fix incorrect check if $options['input'] was ArrayAccess.

[TysonAndre]

Previously, $input was always null, and that should have checked $options['input'] instead. (for && ! $input instanceof ArrayAccess) Move the assignment to $input above the conditions.

Provide a narrative description of what you are trying to accomplish:

• [x] Are you fixing a bug?

  • [x] Detail how the bug is invoked currently.
  • [x] Detail the original, incorrect behavior. ArrayAccess was not allowed for SessionArrayStorage and an exception would be thrown
  • [x] Detail the new, expected behavior. ArrayAccess is now allowed for SessionArrayStorage
  • [x] Base your feature on the master branch, and submit against that branch.
  • [x] Add a regression test that demonstrates the bug, and proves the fix.
  • [ ] Add a CHANGELOG.md entry for the fix.

• [ ] Are you creating a new feature?

  • [ ] Why is the new feature needed? What purpose does it serve?
  • [ ] How will users use the new feature?
  • [ ] Base your feature on the develop branch, and submit against that branch.
  • [ ] Add only one feature per pull request; split multiple features over multiple pull requests
  • [ ] Add tests for the new feature.
  • [ ] Add documentation for the new feature.
  • [ ] Add a CHANGELOG.md entry for the new feature.

• [ ] Is this related to quality assurance?

• [ ] Is this related to documentation?

[michalbundyra]

Thanks, @TysonAndre!