Got the bugger. Eric's now passing in a hint structure to dbopen()

but forgot to zero the structure first, leaving hinfo.bsize undefined
and causing a loop in __log2().

usr.sbin/sendmail/makemap/makemap.c

@@ -312,6 +312,7 @@ main(argc, argv)
 #ifdef NEWDB
 	  case T_HASH:
 		/* tweak some parameters for performance */
+		bzero(&hinfo, sizeof(hinfo));
 		hinfo.nelem = 4096;
 		hinfo.cachesize = dbcachesize;