[igraph] graphopt in python

[Matthew Walker]

Hi,

I was surprised to see that the graphopt layout code in python was 
missing the ability to pass a seed.  Attached is a "context diff" of 
src/graphopt.c.  All I did was copy the seed-related code from 
igraph_layout_grid_fruchterman_reingold() and now seeding graphopt seems 
to work happily too.

I hope this is useful.  If I haven't done a good job with the "diff", 
please tell me what would be better.

Cheers,

Matthew

graphobject.c.diff
Description: graphobject.c.diff