Ignore line, do not report as error

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2560#issuecomment-1492959500

src/js/static-filtering-parser.js

@@ -1126,8 +1126,9 @@ export class AstFilterParser {
         if ( tail !== 0 ) {
             this.linkRight(prev, tail);
         }
-        if ( this.astType !== AST_TYPE_NETWORK ) { return 0; }
-        this.validateNet();
+        if ( this.astType === AST_TYPE_NETWORK ) {
+            this.validateNet();
+        }
         return this.throwHeadNode(head);
     }