Use uintptr_t to look at the bits of a pointer.
We use AC_TYPE_UINTPTR_T in the configure script, so it'll be defined if
we use autotools, and MSVC has supported it since at least Visual Studio
.NET 2003, so we'll use it instead of "unsigned long"; "unsigned long"
causes warnings on LLP64 platforms, as it's not wide enough for a
pointer on those platforms.
diff --git a/in_cksum.c b/in_cksum.c
index 8ceaf10..e9bed22 100644
--- a/in_cksum.c
+++ b/in_cksum.c
@@ -92,7 +92,7 @@
/*
* Force to even boundary.
*/
- if ((1 & (unsigned long) w) && (mlen > 0)) {
+ if ((1 & (uintptr_t) w) && (mlen > 0)) {
REDUCE;
sum <<= 8;
s_util.c[0] = *(const uint8_t *)w;
