result from the ADDCARRY portion of the REDUCE macro.
-#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x)
+#define ADDCARRY(x) {if ((x) > 65535) (x) -= 65535;}
The new code is from in_cksum.c in the Tahoe/CGI port of 4.4BSD-Lite2 (we're
using the "Portable Version" copy otherwise).
svn path=/trunk/; revision=35589