pimd: Remove unused pim checksum in favour of quagga's version.
diff --git a/pimd/pim_msg.c b/pimd/pim_msg.c
index 79ae33a..8ead7ce 100644
--- a/pimd/pim_msg.c
+++ b/pimd/pim_msg.c
@@ -46,7 +46,7 @@
    */
 
   *(uint16_t *) PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg) = 0;
-  checksum = pim_inet_checksum(pim_msg, pim_msg_size);
+  checksum = in_cksum(pim_msg, pim_msg_size);
   *(uint16_t *) PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg) = checksum;
 }