povray upgrade fails

[Jeremy Lavergne]

> :info:build png_pov.cpp:170:19: error: member access into incomplete type 'png_struct' (aka 'png_struct_def')
> :info:build           longjmp(png_ptr->jmpbuf,1);
> :info:build                          ^
> 
> 
> There were numerous other errors of the same kind.
> 
> Before I file a bug report … Anybody have information or suggestions about this.

That's due to the libpng API change recently; we'll need to update all the packages affected. Please feel free to make a ticket that lists any such ports with this problem.