pimd: fix format strings

 * pim_igmp.c,
 * pim_igmpv3.c,
 * pim_pim.c,
 * pim_tlv.c: use %zu / %zd for size_t/ssize_t
 * pim_iface.c,
 * pim_ifchannel.c,
 * pim_mroute.c,
 * pim_neighbor.c,
 * pim_oil.c,
 * pim_ssmpingd.c,
 * pim_upstream.c: %zu for size_t
 * pim_cmd.c: %zu + a few (long long) casts for int64_t
 * pim_hello.c: %td for ptrdiff_t
diff --git a/pimd/pim_neighbor.c b/pimd/pim_neighbor.c
index 9013b50..0df7422 100644
--- a/pimd/pim_neighbor.c
+++ b/pimd/pim_neighbor.c
@@ -292,7 +292,7 @@
 
   neigh = XMALLOC(MTYPE_PIM_NEIGHBOR, sizeof(*neigh));
   if (!neigh) {
-    zlog_err("%s: PIM XMALLOC(%d) failure",
+    zlog_err("%s: PIM XMALLOC(%zu) failure",
 	     __PRETTY_FUNCTION__, sizeof(*neigh));
     return 0;
   }