Re: png-1.5 breakage status

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

graphics/libvideogfx:

png.cc: In function 'void
videogfx::ReadImage_PNG(videogfx::Image<unsigned char>&,
std::istream&)':
png.cc:117: error: invalid use of undefined type 'struct png_struct_def'
/scratch/graphics/libvideogfx/work/.buildlink/include/png.h:795: error:
forward declaration of 'struct png_struct_def'
png.cc: In function 'void videogfx::WriteImage_PNG(const
videogfx::Image<unsigned char>&, std::ostream&)':
png.cc:312: error: invalid use of undefined type 'struct png_struct_def'
/scratch/graphics/libvideogfx/work/.buildlink/include/png.h:795: error:
forward declaration of 'struct png_struct_def'

Joerg