fix: do not throw on empty cdata

Author: pauldambra

packages/rrweb-snapshot/src/rebuild.ts

@@ -432,6 +432,9 @@ function buildNode(
       }
       return doc.createTextNode(n.textContent);
     case NodeType.CDATA:
+      if (n.textContent.trim() === '') {
+        return null;
+      }
       return doc.createCDATASection(n.textContent);
     case NodeType.Comment:
       return doc.createComment(n.textContent);