Re: png-1.5 breakage status

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

x11/nucleo fails with:

PNGenc.cxx: In function 'void nucleo::png_memory_write_data(png_struct*,
png_byte*, png_size_t)':
PNGenc.cxx:38: error: invalid use of undefined type 'struct
png_struct_def'
/scratch/x11/nucleo/work/.buildlink/include/png.h:795: error: forward
declaration of 'struct png_struct_def'
PNGenc.cxx: In function 'void nucleo::png_memory_read_data(png_struct*,
png_byte*, png_size_t)':
PNGenc.cxx:133: error: invalid use of undefined type 'struct
png_struct_def'
/scratch/x11/nucleo/work/.buildlink/include/png.h:795: error: forward
declaration of 'struct png_struct_def'

Joerg