Cannot interpret float as int when using nr_verts argument

[tomfrankkirk]

When using the nr_verts argument to icosphere(), I get a np error that a "Float64 cannot be interpreted as an integer".

I think what is happening is that line 60 returns a float value, which is then used to define the shape of an empty array in line 119. Numpy will raise an exception when a float is used to define the shape of an array.

I changed line 61 to read nu = int(max(nu, nu_min)) and this seems to solve the issue, but I haven't tested this completely.