[Neos] AbstractViewHelper bug

[Rens Admiraal]

Hey guys,

I've a quesiton. When I updated my site to current Neos master it broke 
with the following error:

Exception while rendering
page<TYPO3.Neos:Page>/
neosBackendDocumentNodeData:
Notice: Undefined index: tag in 
/.../Packages/Framework/TYPO3.Fluid/Classes/TYPO3/Fluid/Core/ViewHelper/AbstractViewHelper.php 
line 269 (20131116075401c4cd3c)

I made a fix which I think is valid (as it fixes a possible problem in 
the AbstractViewHelper) but it feels a bit like fixing the symptom 
caused by a possible bug in the way te ViewHelper is used during page 
rendering.

What do you think of https://review.typo3.org/#/c/25454/ ?

Greetz,
Rens