[r74] Visible returns true on invis layer

Expected:

If an object is on an invisible layer, the condition 'visible' for that object should return false.

Actual:

If an object is on an invisible layer, the condition 'visible' for that object returns true.

Repro:

1) Create an object on a layer.

2) Make the layer invisible

3) Create a condition testing if the object is visible

Demo

dl.dropbox.com/u/46072108/layervisbug.capx

Changed for next build.