crag guide bug (clicking on topos)

[cgome]

When you click on a topo in a crag guide that is created at the level at which the topo was added, it opens up fine.

e.g. Click on the first topo at

http://www.thecrag.com/area/29017902/guide

takes you to

http://www.thecrag.com/area/29017902/topo

But when you run create the crag guide at a parent/ancestor level it takes you to that node's topo page and you get an 'empty topo' screen

e.g. Click on the same topo on

http://www.thecrag.com/area/11943313/guide

and you get

http://www.thecrag.com/area/11943313/topo

I can see the logic in how the links are working, but in instances like this it gives dodgy result.

[cgome]

Tested in dev- works fine