[GRASS5] clean, build

[Moritz Lennert]

Radim Blazek said:
> I have done some optimization in cleaning functions and build
> process. Build and cleaning should be now faster and more reliable.
> However, maybe that I introduced new bugs, especially in point
> in polygon/area function and assigning of isles and centroids to areas
> could fail.
> v.in.ogr without '-c' option should now in theory create clean file
> which builds without "Number of incorrect boundaries" (i.e. 0).
> I am interested in data where it fails, v.build error= can
> extract errors from the vector.
>

Radim,

Thanks a lot for these improvements. I can now import the file I had
problems with (the one we had a private exchange about), without hardly
any errors (only a few areas without centroid). This makes v.in.ogr much
more usable for me.

Moritz