ports build failure, max_align_t

[Stuart Henderson]

graphics/ttfautohint

c++ -std=gnu++11 -DHAVE_CONFIG_H -I. -I..   -I../lib  -I../gnulib/src  
-I../gnulib/src  -I/usr/X11R6/include/freetype2   -O2 -pipe -MT info.o -MD -MP 
-MF .deps/info.Tpo -c -o info.o info.cpp
In file included from ../gnulib/src/stdio.h:53:0,
                 from info.cpp:15:
../gnulib/src/stddef.h:106:3: error: conflicting declaration 'typedef union 
max_align_t max_align_t'
 } max_align_t;
   ^
In file included from ../gnulib/src/stddef.h:55:0,
                 from ../gnulib/src/stdio.h:53,
                 from info.cpp:15:
/usr/include/stddef.h:80:3: note: previous declaration as 'typedef struct 
max_align_t max_align_t'
 } max_align_t;
   ^