ports/graphics/netpbm make failed

[E.Girkantas]

--SKIP--
cc -c -I/usr/ports/graphics/netpbm/work/netpbm-10.24/converter/other -I.
-I/usr/ports/graphics/netpbm/work/netpbm-10.24/util 
-I/usr/local/include -I/usr/local/include -I/usr/include
-I/usr/local/include -I/usr/ports/graphics/netpbm/work/netpbm-10.24/urt
\     -O -pipe -mtune=pentiumpro  -o pstopnm.o pstopnm.c
In file included from pstopnm.c:26:
/usr/include/sys/wait.h:115: error: duplicate member 'w_Filler'
/usr/include/sys/wait.h:116: error: duplicate member 'w_Retcode'
/usr/include/sys/wait.h:116: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:117: error: duplicate member 'w_Coredump'
/usr/include/sys/wait.h:117: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:117: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:118: error: duplicate member 'w_Termsig'
/usr/include/sys/wait.h:118: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:118: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:118: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:133: error: duplicate member 'w_Filler'
/usr/include/sys/wait.h:134: error: duplicate member 'w_Stopsig'
/usr/include/sys/wait.h:134: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:135: error: duplicate member 'w_Stopval'
/usr/include/sys/wait.h:135: error: duplicate member '({anonymous})'
/usr/include/sys/wait.h:135: error: duplicate member '({anonymous})'
gmake[2]: *** [pstopnm.o] Error 1
gmake[2]: Leaving directory
`/usr/ports/graphics/netpbm/work/netpbm-10.24/converter/other' gmake[1]:
*** [other/all] Error 2 gmake[1]: Leaving directory
`/usr/ports/graphics/netpbm/work/netpbm-10.24/converter' gmake: ***
[converter/all] Error 2*** Error code 2