netpbm doesn't compile under 3.99.19

[Paulo Aukar <ptaaukar%terra.com.br@localhost>]

I get an error when compiling pkgsrc/graphics/netpbm (-10.33 2) under 
current 3.99.19 i386:

-o rlatopam.o rlatopam.c
In file included from /usr/include/netinet/in.h:474,
                from rlatopam.c:16:
/usr/include/netinet6/in6.h:490: error: parse error befor "u_int32_t"
/usr/include/netinet6/in6.h:757: error: parse error before "u_int8_t"
/usr/include/netinet6/in6.h:762: error: parse error before "u_int8_t"
/usr/include/netinet6/in6.h:764: error: parse error before "u_int8_t"
gmake[2]: *** [rlatopam.o] Error 1

Paulo