Set MsgBuffers to 0 when newly allocated

Enclave/route.cpp

@@ -38,6 +38,7 @@ struct MsgBuffer {
         inserted = 0;
         // This may throw bad_alloc, but we'll catch it higher up
         buf = new uint8_t[size_t(msgs) * g_teems_config.msg_size];
+        memset(buf, 0, size_t(msgs) * g_teems_config.msg_size);
         bufsize = msgs;
         nodes_received = 0;
     }