Fix this compiler error on Mac OS X "Tiger":
Fix this compiler error on Mac OS X "Tiger":

  config/gen/platform/darwin/memalign.c: In function 'Parrot_memalign':
  config/gen/platform/darwin/memalign.c:58: warning: initialization makes integer from pointer without a cast


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@10764 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot