build failure: amd64, in toolcontext.o

[Steven Bellovin <smb%cs.columbia.edu@localhost>]

--- toolcontext.o ---
#   compile  liblvm/toolcontext.o
/usr/BUILD/tools/bin/x86_64--netbsd-gcc -O2  -Werror    
-I/usr/src/external/gpl2/lvm2/dist/lib 
-I/usr/src/external/gpl2/lvm2/dist/include  -I.   -nostdinc -isystem 
/usr/BUILD/netbsd/usr/include -c    
/usr/src/external/gpl2/lvm2/dist/lib/commands/toolcontext.c -o toolcontext.o
cc1: warnings being treated as errors
/usr/src/external/gpl2/lvm2/dist/lib/commands/toolcontext.c: In function 
'_init_single_segtype':
/usr/src/external/gpl2/lvm2/dist/lib/commands/toolcontext.c:854: warning: cast 
to pointer from integer of different size
*** [toolcontext.o] Error code 1
1 error



                --Steve Bellovin, http://www.cs.columbia.edu/~smb