Fix remaining 32-bit compile issues

Change-Id: I9664214652229b663c3e3ba7406b4ede96bfb123
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vlibmemory/memory_vlib.c b/src/vlibmemory/memory_vlib.c
index 29a5c2c..acba8b3 100644
--- a/src/vlibmemory/memory_vlib.c
+++ b/src/vlibmemory/memory_vlib.c
@@ -216,7 +216,8 @@
      am->shmem_hdr->application_restarts);
   rp->context = mp->context;
   rp->response = ntohl (rv);
-  rp->message_table = (u64) am->serialized_message_table_in_shmem;
+  rp->message_table =
+    pointer_to_uword (am->serialized_message_table_in_shmem);
 
   vl_msg_api_send_shmem (q, (u8 *) & rp);
 }