Snow Leopard woes contd

Hi Daniel etc
I am still having trouble building under Snow Leopard. I guessed the 
version gprolog-20091123.tgz might include your fix to this problem, but 
when I try to build it the configure script runs OK but when I try to 
make I get:
jasper-taylors-macbook:src jaspert$ make
(cd EnginePl; make config)
gcc -m32 -O3 -fomit-frame-pointer  -o pl_config pl_config.c
./pl_config
Bad Value of WORD_SIZE - should be 32
make[1]: *** [wam_regs.h] Error 1
make: *** [all] Error 2
Any suggestions?
    --Jasper