[elpa] externals/ess 742dc13262: Fix `ess-elisp-trace-mode`

[ELPA Syncer]

branch: externals/ess
commit 742dc13262c156539c69d8bb4017966bda5469dc
Author: Lionel Henry <lionel.hry@gmail.com>
Commit: Lionel Henry <lionel.hry@gmail.com>

    Fix `ess-elisp-trace-mode`
---
 lisp/ess-utils.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/ess-utils.el b/lisp/ess-utils.el
index e6e7dc3a45..60d7f815dc 100644
--- a/lisp/ess-utils.el
+++ b/lisp/ess-utils.el
@@ -403,7 +403,8 @@ calling `untrace-function' on these functions."
                                  #'untrace-function
                                #'trace-function))))
     (dolist (fn fns)
-      (funcall do (intern fn)))))
+      (when (symbol-function (intern fn))
+        (funcall do (intern fn))))))
 
 
 ;;*;; External modes