Backport Lexbor changes to 8.4

Author: nielsdos

ext/dom/lexbor/lexbor/core/in.c

@@ -65,7 +65,7 @@ lexbor_in_node_make(lexbor_in_t *incoming, lexbor_in_node_t *last_node,
 
     node->opt = LEXBOR_IN_OPT_UNDEF;
     node->begin = buf;
-    node->end = buf + buf_size;
+    node->end = buf ? (buf + buf_size) : NULL;
     node->use = buf;
 
     if (last_node != NULL) {

ext/dom/lexbor/lexbor/core/str.c

@@ -133,6 +133,10 @@ lexbor_str_append(lexbor_str_t *str, lexbor_mraw_t *mraw,
 {
     lxb_char_t *data_begin;
 
+    if (length == 0) {
+        return str->data;
+    }
+
     lexbor_str_check_size_arg_m(str, lexbor_str_size(str),
                                 mraw, (length + 1), NULL);
 

ext/dom/lexbor/lexbor/dom/interfaces/node.c

@@ -248,11 +248,6 @@ lxb_dom_node_t *
 lxb_dom_node_destroy(lxb_dom_node_t *node)
 {
     lxb_dom_node_remove(node);
-
-    if (node->owner_document->ev_destroy != NULL) {
-        node->owner_document->ev_destroy(node);
-    }
-
     return lxb_dom_document_destroy_interface(node);
 }