Get rid of some warnings when compiling 64bit.
diff --git a/libiptc/libip6tc.c b/libiptc/libip6tc.c
index f7947db..6400ce3 100644
--- a/libiptc/libip6tc.c
+++ b/libiptc/libip6tc.c
@@ -176,7 +176,7 @@
printf("Flags: %02X\n", e->ipv6.flags);
printf("Invflags: %02X\n", e->ipv6.invflags);
printf("Counters: %llu packets, %llu bytes\n",
- e->counters.pcnt, e->counters.bcnt);
+ (unsigned long long)e->counters.pcnt, (unsigned long long)e->counters.bcnt);
printf("Cache: %08X ", e->nfcache);
if (e->nfcache & NFC_ALTERED) printf("ALTERED ");
if (e->nfcache & NFC_UNKNOWN) printf("UNKNOWN ");