bugfix (Thanks to John Sucaet)

net.c

@@ -942,9 +942,9 @@ handle_request(coap_context_t *context, coap_queue_t *node) {
     return;
   }
   
-  
   /* the resource was found, check if there is a registered handler */
-  if (node->pdu->hdr->code < sizeof(resource->handler))
+  if ((size_t)node->pdu->hdr->code < 
+      sizeof(resource->handler)/sizeof(coap_method_handler_t))
     h = resource->handler[node->pdu->hdr->code - 1];
   
   if (h) {