Eglot: fix thinko in previous commit

* lisp/progmodes/eglot.el (eglot--hierarchy-1): 'roots' is a
vector.

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/progmodes/eglot.el b/lisp/progmodes/eglot.el
index eb9ce613afb..2deeef9bce1 100644
--- a/lisp/progmodes/eglot.el
+++ b/lisp/progmodes/eglot.el
@@ -4532,7 +4532,8 @@ If NOERROR, return predicate, else erroring function."
                  server
                  preparer
                  (eglot--TextDocumentPositionParams))))
-    (unless roots (eglot--error "No hierarchy information here"))
+    (unless (cl-plusp (length roots))
+      (eglot--error "No hierarchy information here"))
     (with-current-buffer (get-buffer-create name)
       (eglot-hierarchy-mode)
       (setq-local