.layout() call runs "forever" even if timeout is specified

The problem can be reproduced with the following code:

```
import indigo

ind = indigo.Indigo()
ind.setOption('timeout', 1000)
ind.setOption('layout-max-iterations', 1)
ind.setOption('smart-layout', False)

smiles = "O=[W]12345678(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)(=O)[W][W]1[W]2[W]3[W]4[W]5[W]6[W]7[W]8"

imol = ind.loadMolecule(smiles)
imol.layout()
# and now we wait forever...
````

Python version:
Python 3.9.12

Indigo version:
1.6.1.0-g5dbb0c0f4-x86_64-linux-gnu-10.2.1

I know this is a really silly structure/SMILES but we actually encountered it. :)

Thank you!