Update clusterMsgDataPublish to clusterMsgModule (#7682)

Correcting the variable to clusterMsgModule.

(cherry picked from commit f7cf24b5da539dbf4fafc404355a32bac06aa2f5)

src/cluster.c

@@ -1767,7 +1767,7 @@ int clusterProcessPacket(clusterLink *link) {
     } else if (type == CLUSTERMSG_TYPE_MODULE) {
         uint32_t explen = sizeof(clusterMsg)-sizeof(union clusterMsgData);
 
-        explen += sizeof(clusterMsgDataPublish) -
+        explen += sizeof(clusterMsgModule) -
                 3 + ntohl(hdr->data.module.msg.len);
         if (totlen != explen) return 1;
     }