x11/fox does not build with recent png

[Erik Bertelsen <bertelsen.erik%gmail.com@localhost>]

With pkgsrc sources update as of a few hours ago, a clean rebuild of x11/fox yields:

libtool: compile:  c++ -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"fox\" -DVERSION=\"1.6.33\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DTIME_WITH_SYS_TIME=1 -DHAVE_SYS_WAIT_H=1 -DHAVE_DIRENT_H=1 -DHAVE_GETPAGESIZE=1 -DHAVE_MMAP=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_SYS_SELECT_H=1 -DHAVE_SYS_FILIO_H=1 -DHAVE_X11_EXTENSIONS_SHAPE_H=1 -DHAVE_X11_EXTENSIONS_XSHM_H=1 -DHAVE_PNG_H=1 -DHAVE_TIFF_H=1 -DHAVE_ZLIB_H=1 -DHAVE_BZLIB_H=1 -DHAVE_X11_XCURSOR_XCURSOR_H=1 -DHAVE_X11_EXTENSIONS_XRANDR_H=1 -DHAVE_VSSCANF=1 -DHAVE_VSNPRINTF=1 -DHAVE_STRTOLL=1 -DHAVE_STRTOULL=1 -I. -I../include -I/home/NetBSD/wrkobj/x11/fox/work.i386/.buildlink/include -I/home/NetBSD/wrkobj/x11/fox/work.i386/.x11-buildlink/include/freetype2 -I/home/NetBSD/wrkobj/x11/fox/work.i386/.x11-buildlink/include -O2 -DHAVE_XFT_H=1 -D_REENTRANT -DHAVE_XSHAPE_H=1 -DHAVE_XSHM_H=1 -DFOX_THREAD_SAFE=1 -D_POSIX_PTHREAD_SEMANTICS -D_GNU_SOURCE -DHAVE_JPEG_H=1 -DHAVE_BZ2LIB_H=1 -DHAVE_XCURSOR_H=1 -DHAVE_XRANDR_H=1 -DNO_XIM -Wall -W -Woverloaded-virtual -Wformat -O2 -DNDEBUG -Wuninitialized -ffast-math -finline-functions -fomit-frame-pointer -fexpensive-optimizations -fno-strict-aliasing -DHAVE_GLU_H=1 -DHAVE_GL_H=1 -c fxpngio.cpp  -fPIC -DPIC -o .libs/fxpngio.o
fxpngio.cpp: In function 'void FX::user_error_fn(png_struct*, const char*)':
fxpngio.cpp:78: error: invalid use of undefined type 'struct png_struct_def'
/home/NetBSD/wrkobj/x11/fox/work.i386/.buildlink/include/png.h:793: error: forward declaration of 'struct png_struct_def'
fxpngio.cpp: In function 'bool FX::fxloadPNG(FX::FXStream&, FX::FXColor*&, FX::FXint&, FX::FXint&)':
fxpngio.cpp:121: error: invalid use of undefined type 'struct png_struct_def'
/home/NetBSD/wrkobj/x11/fox/work.i386/.buildlink/include/png.h:793: error: forward declaration of 'struct png_struct_def'
fxpngio.cpp: In function 'bool FX::fxsavePNG(FX::FXStream&, const FX::FXColor*, FX::FXint, FX::FXint)':
fxpngio.cpp:234: error: invalid use of undefined type 'struct png_struct_def'
/home/NetBSD/wrkobj/x11/fox/work.i386/.buildlink/include/png.h:793: error: forward declaration of 'struct png_struct_def'
*** Error code 1

Stop.
make: stopped in /home/NetBSD/wrkobj/x11/fox/work.i386/fox-1.6.33/src
*** Error code 1

Stop.
make: stopped in /home/NetBSD/wrkobj/x11/fox/work.i386/fox-1.6.33
*** Error code 1

Stop.
make: stopped in /home/NetBSD/pkgsrc/x11/fox
*** Error code 1

Stop.
make: stopped in /home/NetBSD/pkgsrc/x11/fox
*** Error code 1



regards
Erik