regex.c is not 64bit clean

[H . J . Lu]

I got

regex.c:2982: warning: cast from pointer to integer of different size
regex.c:4156: warning: cast from pointer to integer of different size
regex.c:4156: warning: cast from pointer to integer of different size
regex.c: In function `compile_range':
regex.c:4394: warning: cast to pointer from integer of different size
regex.c: In function `re_match_2_internal':
regex.c:5996: warning: cast to pointer from integer of different size
regex.c:6116: warning: cast from pointer to integer of different size
regex.c:6116: warning: cast from pointer to integer of different size

on ia64.

-- 
H.J. Lu (hjl@valinux.com)