consistency

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
it shouldn’t be possible to attempt to determine child size without an index

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
for certain calculations we want to always use the current value and not update

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
Merge pull request #578 from enyojs/GF-53473-coledavis

Fix for: GF-53473

Reviewed-By: Ben Combee (ben.combee@lge.com)